/* roulang page: index */
:root {
            --bg-deep: #070D1A;
            --bg-navy: #0B1424;
            --primary: #2F7BFF;
            --accent: #46D9FF;
            --warm: #E7B95B;
            --success: #4ADE80;
            --danger: #FB7185;
            --text-head: #F0F6FF;
            --text-body: #C7D2E0;
            --text-sub: #8091AA;
            --glass-bg: rgba(17, 30, 58, 0.55);
            --line-light: rgba(255, 255, 255, 0.12);
            --line-soft: rgba(255, 255, 255, 0.06);
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.3);
            --radius-card: 18px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background:
                radial-gradient(1150px 620px at 88% -10%, rgba(70, 217, 255, 0.10), transparent 60%),
                radial-gradient(900px 650px at -5% 38%, rgba(47, 123, 255, 0.10), transparent 55%),
                linear-gradient(180deg, rgba(7, 13, 26, 0.4) 0%, rgba(7, 13, 26, 0.2) 40%, rgba(7, 13, 26, 0.55) 100%),
                #070D1A;
            background-attachment: fixed;
            font-family: "PingFang SC", "Microsoft YaHei", "微软雅黑", "Source Han Sans SC", "Inter", "DIN Alternate", sans-serif;
            color: var(--text-body);
            line-height: 1.8;
            min-height: 100vh;
            padding-top: 73px;
        }

        @media (min-width: 768px) {
            body {
                padding-top: 118px;
            }
        }

        ::selection {
            background: rgba(47, 123, 255, 0.35);
            color: #fff;
        }

        .wrap {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-space {
            padding: 96px 0;
        }

        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px) saturate(140%);
            -webkit-backdrop-filter: blur(16px) saturate(140%);
            border: 1px solid var(--line-soft);
            border-top-color: rgba(255, 255, 255, 0.12);
            box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-card);
            transition: transform .28s ease, border-color .28s ease, background .28s ease;
        }

        .glass-card:hover {
            border-color: rgba(255, 255, 255, 0.3);
            background: rgba(19, 34, 64, 0.62);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 0 22px;
            border-radius: 10px;
            background: linear-gradient(135deg, #2F7BFF, #46D9FF);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border: 0;
            box-shadow: 0 6px 30px rgba(47, 123, 255, 0.45);
            transition: all .25s ease;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #3b88ff, #5adfff);
            box-shadow: 0 8px 38px rgba(47, 123, 255, 0.58);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 4px 20px rgba(47, 123, 255, 0.40);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 0 20px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.16);
            color: #D9E4F2;
            font-weight: 500;
            transition: all .2s ease;
            text-decoration: none;
        }

        .btn-ghost:hover {
            border-color: #46D9FF;
            color: #fff;
            background: rgba(70, 217, 255, 0.08);
            transform: translateY(-1px);
        }

        .btn-ghost:active {
            transform: translateY(1px);
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 60;
            background: rgba(6, 10, 21, 0.72);
            backdrop-filter: blur(18px) saturate(150%);
            -webkit-backdrop-filter: blur(18px) saturate(150%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .site-header.scrolled {
            background: rgba(6, 10, 21, 0.92);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.30);
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 11px;
            text-decoration: none;
            color: #fff;
            min-width: 0;
        }

        .brand-mark {
            width: 40px;
            height: 40px;
            flex: 0 0 40px;
            border-radius: 13px;
            background: linear-gradient(145deg, rgba(47, 123, 255, 0.28), rgba(70, 217, 255, 0.10));
            border: 1px solid rgba(255, 255, 255, 0.22);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 22px rgba(47, 123, 255, 0.28);
            position: relative;
        }

        .brand-mark::after {
            content: "";
            position: absolute;
            inset: 3px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-name {
            font-size: 19px;
            font-weight: 800;
            letter-spacing: 0.04em;
            color: #fff;
        }

        .brand-sub {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.52);
            letter-spacing: 0.08em;
            margin-top: 3px;
        }

        .search-wrap {
            width: 100%;
            max-width: 650px;
            height: 46px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.13);
            border-radius: 14px;
            display: flex;
            align-items: center;
            padding: 0 6px 0 14px;
            backdrop-filter: blur(10px);
            transition: border-color .25s ease, box-shadow .25s ease, background .25s ease;
        }

        .search-wrap:focus-within {
            border-color: rgba(70, 217, 255, 0.70);
            background: rgba(255, 255, 255, 0.10);
            box-shadow: 0 0 0 4px rgba(70, 217, 255, 0.08);
        }

        .search-wrap input {
            flex: 1;
            min-width: 0;
            background: transparent;
            border: 0;
            outline: none;
            color: #EAF0F9;
            font-size: 14px;
            padding: 0 10px;
            height: 100%;
        }

        .search-wrap input::placeholder {
            color: rgba(255, 255, 255, 0.40);
        }

        .search-key-hint {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.42);
            padding: 3px 9px;
            border-radius: 6px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            background: rgba(255, 255, 255, 0.05);
            white-space: nowrap;
        }

        .nav-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.62);
            font-size: 13px;
            line-height: 1;
            padding: 9px 15px;
            border-radius: 999px;
            border: 1px solid transparent;
            text-decoration: none;
            transition: all .22s ease;
        }

        .nav-pill:hover {
            color: #46D9FF;
            background: rgba(70, 217, 255, 0.08);
            border-color: rgba(70, 217, 255, 0.15);
        }

        .nav-pill.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(47, 123, 255, 0.20), rgba(70, 217, 255, 0.10));
            border-color: rgba(70, 217, 255, 0.32);
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
        }

        .mobile-menu-panel {
            max-height: 0;
            overflow: hidden;
            transition: max-height .32s ease;
            background: rgba(7, 13, 26, 0.94);
            backdrop-filter: blur(19px);
            -webkit-backdrop-filter: blur(19px);
        }

        .mobile-menu-panel.open {
            max-height: 380px;
        }

        .hamburger-btn {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.10);
        }

        .hamburger-btn span {
            display: block;
            width: 18px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: all .25s ease;
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .hero-section {
            position: relative;
            overflow: hidden;
            background-image: linear-gradient(to right, rgba(7, 13, 26, 0.94), rgba(7, 13, 26, 0.64)), linear-gradient(65deg, rgba(7, 13, 26, 0.68), rgba(7, 13, 26, 0.28)), url("/assets/images/backpic/back-1.webp");
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .hero-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 56px 56px;
            mask-image: linear-gradient(to bottom, transparent, #000 30%, #000 80%, transparent);
            -webkit-mask-image: linear-gradient(to bottom, transparent, #000 30%, #000 80%, transparent);
            pointer-events: none;
        }

        .hero-verify {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 13px;
            border-radius: 999px;
            background: linear-gradient(135deg, rgba(47, 123, 255, 0.15), rgba(70, 217, 255, 0.1));
            border: 1px solid rgba(70, 217, 255, 0.28);
            color: rgba(230, 246, 255, 0.92);
            font-size: 12px;
            letter-spacing: 0.05em;
        }

        .hero-verify svg {
            color: var(--accent);
        }

        .hero-shortcut {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-top: 26px;
        }

        @media (min-width: 640px) {
            .hero-shortcut {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        .hero-shortcut a {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.64);
            font-size: 14px;
            padding: 10px 8px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.06);
            text-decoration: none;
            transition: all .2s ease;
        }

        .hero-shortcut a:hover {
            color: #fff;
            border-color: rgba(70, 217, 255, 0.3);
            background: rgba(70, 217, 255, 0.07);
            transform: translateY(-2px);
        }

        .hero-shortcut svg {
            color: var(--accent);
        }

        .login-check-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 24px 16px;
        }

        .login-check-body {
            padding: 20px 24px 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .check-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 13px;
            padding: 11px 14px;
        }

        .check-row .row-label {
            color: #A9B9CC;
            font-size: 13px;
        }

        .check-row .row-value {
            color: #fff;
            font-size: 13px;
            font-weight: 500;
        }

        .check-row .state-glow {
            color: var(--success);
        }

        .pain-grid {
            display: grid;
            grid-template-columns: 1.15fr 1fr 1fr;
            gap: 20px;
            margin-top: 32px;
        }

        .pain-grid .pain-card:first-child {
            grid-row: span 1;
            background: linear-gradient(145deg, rgba(47, 123, 255, 0.10), rgba(17, 30, 58, 0.56));
        }

        @media (max-width: 1024px) {
            .pain-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 560px) {
            .pain-grid {
                grid-template-columns: 1fr;
            }
        }

        .segment-label {
            display: inline-flex;
            align-items: center;
            padding: 5px 12px;
            border-radius: 999px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.55);
            border: 1px solid rgba(255, 255, 255, 0.1);
            background: rgba(255, 255, 255, 0.04);
        }

        .solution-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            align-items: start;
            margin-top: 38px;
        }

        .solution-card {
            padding: 28px;
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .solution-card:nth-child(1) {
            transform: translateY(8px);
        }

        .solution-card:nth-child(2) {
            transform: translateY(-6px);
            border-color: rgba(70, 217, 255, 0.15);
        }

        .solution-card:nth-child(3) {
            transform: translateY(8px);
        }

        @media (max-width: 900px) {
            .solution-grid {
                grid-template-columns: 1fr;
            }

            .solution-card:nth-child(1),
            .solution-card:nth-child(2),
            .solution-card:nth-child(3) {
                transform: none;
            }
        }

        .solution-card .card-extra {
            padding-top: 1.4rem;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            margin-top: 1.4rem;
        }

        .solution-card .point-list {
            list-style: none;
            padding: 0;
            margin: 18px 0 0 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .solution-card .point-list li {
            display: flex;
            align-items: flex-start;
            gap: 9px;
            color: #B7C5D5;
            font-size: 14px;
            line-height: 1.6;
        }

        .solution-card .point-list li svg {
            color: #46D9FF;
            flex: 0 0 auto;
            margin-top: 3px;
        }

        .stats-band {
            background: linear-gradient(90deg, rgba(47, 123, 255, 0.14), rgba(70, 217, 255, 0.05)), rgba(11, 20, 36, 0.72);
            border-top: 1px solid rgba(70, 217, 255, 0.14);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
            padding: 52px 0;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        .stat-num {
            font-family: "Inter", "DIN Alternate", sans-serif;
            font-size: clamp(38px, 4vw, 56px);
            font-weight: 800;
            line-height: 1.1;
            background: linear-gradient(135deg, #FFFFFF 10%, #46D9FF 70%, #2F7BFF 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.02em;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--accent);
            letter-spacing: 0.12em;
            font-weight: 600;
        }

        .section-kicker::before {
            content: "";
            width: 24px;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent));
        }

        .data-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(47, 123, 255, 0.25), rgba(70, 217, 255, 0.28), transparent);
        }

        .support-card-bg {
            background-image:
                radial-gradient(circle at 85% 15%, rgba(70, 217, 255, 0.12), transparent 40%),
                radial-gradient(circle at 10% 90%, rgba(47, 123, 255, 0.12), transparent 42%),
                linear-gradient(145deg, rgba(11, 20, 36, 0.88), rgba(7, 13, 26, 0.88));
            border: 1px solid rgba(255, 255, 255, 0.10);
        }

        .info-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        @media (max-width: 768px) {
            .info-grid {
                grid-template-columns: 1fr;
            }
        }

        .info-card {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 18px;
            background: rgba(13, 23, 43, 0.72);
            border: 1px solid var(--line-soft);
            border-radius: 18px;
            backdrop-filter: blur(10px);
            transition: all .22s ease;
            height: 100%;
        }

        .info-card:hover {
            border-color: rgba(70, 217, 255, 0.22);
            background: rgba(16, 29, 52, 0.84);
            transform: translateY(-2px);
        }

        .date-chip {
            flex: 0 0 auto;
            width: 64px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            background: linear-gradient(145deg, rgba(47, 123, 255, 0.14), rgba(70, 217, 255, 0.08));
            border: 1px solid rgba(70, 217, 255, 0.16);
            border-radius: 13px;
            color: #DCEAFB;
            padding: 8px 4px;
            overflow-wrap: anywhere;
        }

        .read-more {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: #46D9FF;
            font-size: 13px;
            text-decoration: none;
            transition: color .2s;
        }

        .read-more:hover {
            color: #8CE1FF;
        }

        .empty-item {
            grid-column: 1 / -1;
            padding: 30px 24px;
            text-align: center;
            color: rgba(255, 255, 255, 0.38);
            background: rgba(255, 255, 255, 0.03);
            border: 1px dashed rgba(255, 255, 255, 0.14);
            border-radius: 18px;
        }

        .faq-item {
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: 16px;
            background: rgba(12, 22, 40, 0.64);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .2s ease;
        }

        .faq-item.active {
            border-color: rgba(70, 217, 255, 0.20);
        }

        .faq-q {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 18px 20px;
            background: transparent;
            color: #EAF0FA;
            font-size: 15px;
            font-weight: 500;
            text-align: left;
            border: 0;
            cursor: pointer;
        }

        .faq-q .q-icon {
            display: inline-flex;
            width: 24px;
            height: 24px;
            border-radius: 7px;
            align-items: center;
            justify-content: center;
            color: #46D9FF;
            background: rgba(70, 217, 255, 0.08);
            flex: 0 0 auto;
            font-weight: 700;
        }

        .faq-q .arrow-btn {
            width: 30px;
            height: 30px;
            border-radius: 9px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.05);
            color: rgba(255, 255, 255, 0.6);
            transition: transform .2s ease;
            flex: 0 0 auto;
        }

        .faq-item.active .arrow-btn {
            transform: rotate(45deg);
            color: #46D9FF;
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .2s ease;
        }

        .faq-a-inner {
            padding: 0 20px 18px;
            color: #A8B6C7;
            font-size: 14px;
            line-height: 1.8;
        }

        .footer-sub {
            background: linear-gradient(90deg, rgba(255, 255, 255, 0.02), rgba(70, 217, 255, 0.20), rgba(255, 255, 255, 0.02));
            height: 1px;
            border: 0;
        }

        .modal-mask {
            position: fixed;
            inset: 0;
            z-index: 100;
            background: rgba(3, 7, 15, 0.74);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            display: none;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .modal-mask.show {
            display: flex;
        }

        .modal-panel {
            width: 100%;
            max-width: 480px;
            max-height: 92vh;
            overflow-y: auto;
            background: linear-gradient(150deg, rgba(19, 34, 64, 0.94), rgba(7, 13, 26, 0.96));
            border: 1px solid rgba(255, 255, 255, 0.14);
            box-shadow: 0 20px 70px rgba(0, 0, 0, 0.5);
            border-radius: 20px;
        }

        .input-field {
            width: 100%;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 13px;
            color: #fff;
            font-size: 14px;
            padding: 11px 14px;
            outline: none;
            transition: all .2s ease;
            min-height: 44px;
        }

        .input-field::placeholder {
            color: rgba(255, 255, 255, 0.32);
        }

        .input-field:focus {
            border-color: rgba(70, 217, 255, 0.62);
            box-shadow: 0 0 0 4px rgba(70, 217, 255, 0.08);
            background: rgba(255, 255, 255, 0.08);
        }

        .privacy-check {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.46);
        }

        .privacy-check input {
            width: 18px;
            height: 18px;
            margin-top: 2px;
            accent-color: #2F7BFF;
        }

        .form-error {
            color: var(--danger);
            font-size: 13px;
            min-height: 20px;
            display: block;
        }

        .logo-footer {
            font-size: 18px;
            color: #fff;
            font-weight: 800;
        }

        .footer-link {
            color: rgba(255, 255, 255, 0.58);
            font-size: 14px;
            text-decoration: none;
            transition: color .2s ease;
        }

        .footer-link:hover {
            color: #fff;
        }

        .read-line {
            position: relative;
            max-width: 760px;
            color: #AEBCCD;
            font-size: 15px;
            line-height: 1.85;
        }

        .form-pad-bottom {
            padding-bottom: 18px;
        }

/* roulang page: category1 */
:root {
    --bg: #070D1A;
    --bg-2: #0B1424;
    --panel: rgba(13, 24, 48, 0.68);
    --blue: #2F7BFF;
    --cyan: #46D9FF;
    --warm: #E7B95B;
    --success: #4ADE80;
    --danger: #FB7185;
    --text: #E8EEF7;
    --muted: #7E8FA7;
    --line: rgba(255, 255, 255, 0.08);
    --card-radius: 18px;
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", "微软雅黑", "Source Han Sans SC", sans-serif;
    color: var(--text);
    background-color: var(--bg);
    background-image:
      radial-gradient(1000px 600px at 85% -8%, rgba(47, 123, 255, 0.18), transparent 62%),
      radial-gradient(760px 500px at -10% 48%, rgba(70, 217, 255, 0.08), transparent 55%),
      linear-gradient(rgba(255, 255, 255, 0.024) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255, 255, 255, 0.024) 1px, transparent 1px);
    background-size: auto, auto, 64px 64px, 64px 64px;
    background-attachment: fixed;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; height: auto; }
  a { color: inherit; text-decoration: none; }
  h1, h2, h3, h4, p, ul, ol, figure { margin-top: 0; margin-bottom: 0; }
  input, button, select, textarea { font: inherit; }
  button { cursor: pointer; }

  ::selection { background: rgba(70, 217, 255, 0.22); color: #fff; }

  .wrap {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
  }
  .section-space { padding-top: 96px; padding-bottom: 96px; }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(7, 13, 26, 0.72);
    backdrop-filter: blur(18px) saturate(150%);
    -webkit-backdrop-filter: blur(18px) saturate(150%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  }
  .site-header.is-scrolled { background: rgba(4, 8, 17, 0.92); }
  .header-top { min-height: 73px; }
  .header-nav {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 11px 0 13px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }
  .nav-chip {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0 14px;
    border-radius: 999px;
    font-size: 14px;
    color: #B9C6D8;
    background: transparent;
    border: 1px solid transparent;
    transition: color .2s, background .2s, border-color .2s, transform .2s;
  }
  .nav-chip:hover { color: #fff; background: rgba(70, 217, 255, 0.1); border-color: rgba(70, 217, 255, 0.14); }
  .nav-chip.active { color: #fff; background: rgba(47, 123, 255, 0.2); border-color: rgba(70, 217, 255, 0.42); }
  .nav-chip.active::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: -2px;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  }

  .brand-logo { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; }
  .brand-mark {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(47, 123, 255, 0.2), rgba(70, 217, 255, 0.08));
    border: 1px solid rgba(70, 217, 255, 0.22);
    box-shadow: 0 0 22px rgba(47, 123, 255, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  }
  .brand-text { display: flex; flex-direction: column; line-height: 1.25; }
  .brand-name { display: block; font-size: 19px; font-weight: 800; color: #F4F7FB; letter-spacing: 0.03em; }
  .brand-sub { display: block; font-size: 11px; color: rgba(255, 255, 255, 0.5); margin-top: 4px; letter-spacing: 0.1em; }

  .desktop-search { flex: 1; min-width: 0; display: flex; justify-content: center; }
  .mobile-search { margin-top: -2px; padding: 0 20px 14px; }
  .search-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    max-width: 660px;
    height: 46px;
    padding: 0 10px 0 14px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    transition: background .2s, border-color .2s, box-shadow .2s;
  }
  .search-wrap:focus-within {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(70, 217, 255, 0.65);
    box-shadow: 0 0 0 3px rgba(70, 217, 255, 0.14);
  }
  .search-wrap svg { color: #8FA0B8; flex-shrink: 0; }
  .search-wrap input {
    flex: 1;
    min-width: 0;
    height: 100%;
    background: transparent;
    border: 0;
    outline: none;
    color: #E6EDF7;
    font-size: 14px;
  }
  .search-wrap input::placeholder { color: rgba(255, 255, 255, 0.38); }
  .search-key-hint {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 24px;
    padding: 0 8px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    font-size: 11px;
    color: rgba(255, 255, 255, 0.44);
    background: rgba(255, 255, 255, 0.04);
  }

  .btn-primary,
  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 20px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    line-height: 1;
    transition: transform .18s ease, box-shadow .18s ease, background .2s ease, opacity .18s, border-color .18s;
  }
  .btn-primary {
    background: linear-gradient(135deg, var(--blue), var(--cyan));
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 6px 30px rgba(47, 123, 255, 0.36);
    gap: 8px;
  }
  .btn-primary:hover {
    filter: brightness(1.08);
    box-shadow: 0 8px 38px rgba(47, 123, 255, 0.52);
    transform: translateY(-1px);
    color: #fff;
  }
  .btn-primary:active { transform: translateY(0); box-shadow: 0 4px 20px rgba(47, 123, 255, 0.34); }
  .btn-secondary {
    background: rgba(255, 255, 255, 0.04);
    color: #D6E1F0;
    border: 1px solid rgba(255, 255, 255, 0.2);
    gap: 8px;
  }
  .btn-secondary:hover { border-color: rgba(70, 217, 255, 0.6); color: #fff; background: rgba(70, 217, 255, 0.06); }

  .hamburger-btn {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
    color: #fff;
  }
  .hamburger-btn .bar, .hamburger-btn .close-icon { transition: opacity .2s; }
  .hamburger-btn .close-icon { display: none; }
  .hamburger-btn.is-open .bar { display: none; }
  .hamburger-btn.is-open .close-icon { display: block; }

  .mobile-nav {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height .25s ease, opacity .2s ease;
    background: rgba(7, 13, 26, 0.94);
  }
  .mobile-nav.open { max-height: 360px; opacity: 1; }
  .mobile-nav-wrap {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px 0 18px;
  }

  .frost-card,
  .glass-card {
    position: relative;
    border-radius: 18px;
    background: var(--panel);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
    transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
  }
  .frost-card:hover,
  .glass-card:hover { border-color: rgba(255, 255, 255, 0.28); transform: translateY(-2px); box-shadow: 0 16px 46px rgba(0, 0, 0, 0.35); }

  .category-banner { position: relative; min-height: 330px; overflow: hidden; display: flex; align-items: center; }
  .category-banner-media { position: absolute; inset: 0; z-index: -2; }
  .category-banner-media img { width: 100%; height: 100%; object-fit: cover; object-position: center 30%; }
  .category-banner-overlay {
    position: absolute; inset: 0; z-index: -1;
    background:
      radial-gradient(600px 260px at 6% 30%, rgba(70, 217, 255, 0.12), transparent 66%),
      linear-gradient(100deg, rgba(7, 13, 26, 0.96) 0%, rgba(7, 13, 26, 0.82) 48%, rgba(7, 13, 26, 0.68) 100%);
  }
  .banner-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 999px;
    padding: 6px 13px;
    font-size: 12px;
    color: #DDEBFF;
    background: rgba(47, 123, 255, 0.14);
    border: 1px solid rgba(70, 217, 255, 0.28);
  }
  .banner-title {
    font-size: clamp(34px, 4vw, 52px);
    line-height: 1.18;
    font-weight: 800;
    letter-spacing: 0.01em;
    color: #fff;
    max-width: 850px;
  }
  .banner-sub { max-width: 660px; color: #C7D2E0; font-size: 16px; line-height: 1.8; }

  .section-head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 28px; }
  .section-title {
    font-size: clamp(26px, 3vw, 34px);
    line-height: 1.3;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
  }
  .section-desc { color: #7E8FA7; font-size: 14px; max-width: 640px; }

  .entry-card {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 22px;
    padding: 20px;
    border-radius: 18px;
    background: rgba(12, 22, 43, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: transform .2s, border-color .2s, background .2s;
  }
  .entry-card:hover { border-color: rgba(70, 217, 255, 0.35); transform: translateY(-3px); background: rgba(18, 31, 58, 0.64); }
  .entry-card+.entry-card { margin-top: 16px; }
  .entry-thumb {
    width: 96px;
    height: 78px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: linear-gradient(135deg, rgba(47, 123, 255, 0.18), rgba(70, 217, 255, 0.06));
  }
  .entry-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
  .entry-card:hover .entry-thumb img { transform: scale(1.06); }
  .entry-tag { font-size: 11px; color: #8FB4E8; }
  .entry-title { font-size: 20px; font-weight: 700; color: #F2F7FF; line-height: 1.45; margin: 4px 0 8px; }
  .entry-card p { color: #A6B6CA; font-size: 14px; line-height: 1.7; margin-bottom: 10px; }
  .entry-meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 4px; }

  .tag-chip {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 4px 11px;
    font-size: 12px;
    background: rgba(47, 123, 255, 0.12);
    color: #C6DCF8;
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  .side-card + .side-card { margin-top: 20px; }
  .side-card { padding: 22px; }
  .side-card h4 { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 12px; }
  .side-card .side-li { display: flex; align-items: center; gap: 8px; padding: 9px 0; color: #A9BACD; font-size: 14px; border-bottom: 1px dashed rgba(255, 255, 255, 0.07); transition: color .2s; }
  .side-card .side-li:hover { color: #6FD4FF; }
  .side-card .side-li:last-child { border-bottom: 0; }

  .step-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
  .step-card { padding: 24px; border-radius: 18px; background: rgba(12, 22, 43, 0.64); border: 1px solid rgba(255, 255, 255, 0.08); }
  .step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 12px;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--blue), rgba(70, 217, 255, 0.5));
    box-shadow: 0 0 18px rgba(47, 123, 255, 0.25);
    margin-bottom: 18px;
  }
  .step-card h3 { font-size: 18px; color: #fff; font-weight: 700; margin-bottom: 8px; }
  .step-card p { font-size: 14px; color: #AAB8C9; line-height: 1.75; }

  .guide-panel { border-radius: 18px; overflow: hidden; border: 1px solid rgba(255,255,255,.1); background: rgba(12,22,43,.6); }
  .guide-panel-row { display: grid; grid-template-columns: 1fr 1fr; }
  .guide-panel-cell { padding: 30px; border-bottom: 1px solid rgba(255,255,255,.07); }
  .guide-panel-cell:nth-child(even) { border-left: 1px solid rgba(255,255,255,.07); }
  .guide-panel-cell:last-child, .guide-panel-cell:nth-last-child(2):nth-child(odd) { border-bottom: 0; }
  .guide-ico {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 14px;
    margin-bottom: 16px;
    background: rgba(47, 123, 255, 0.14);
    border: 1px solid rgba(70, 217, 255, 0.22);
    color: #6FD4FF;
  }

  .faq-card { border-radius: 18px; background: rgba(12,22,43,.54); border: 1px solid rgba(255,255,255,.08); padding: 20px 22px; transition: border-color .2s, background .2s; }
  .faq-card+.faq-card { margin-top: 12px; }
  .faq-card:hover, .faq-card[open] { background: rgba(16,29,54,.7); border-color: rgba(70,217,255,.28); }
  .faq-card summary { list-style: none; display: flex; align-items: center; gap: 12px; cursor: pointer; font-weight: 600; font-size: 16px; color: #F1F6FF; }
  .faq-card summary::-webkit-details-marker { display: none; }
  .faq-card summary::after {
    content: "+";
    margin-left: auto;
    font-size: 22px;
    color: var(--cyan);
    transform: rotate(0deg);
    transition: transform .2s;
  }
  .faq-card[open] summary::after { transform: rotate(45deg); }
  .faq-answer { color: #AAB8C9; font-size: 15px; line-height: 1.8; padding-top: 14px; margin-left: 32px; }

  .cta-strip {
    position: relative;
    overflow: hidden;
    border-radius: 22px;
    padding: 44px 42px;
    background: linear-gradient(110deg, rgba(47,123,255,.18), rgba(70,217,255,.1));
    border: 1px solid rgba(70,217,255,.24);
  }
  .privacy-note { display: flex; gap: 8px; align-items: flex-start; font-size: 12px; color: rgba(255,255,255,.5); }

  .category-switcher { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
  .glass-switch {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 999px;
    padding: 0 18px;
    min-height: 42px;
    color: #C6D2E2;
    border: 1px solid rgba(255,255,255,.16);
    background: rgba(255,255,255,.05);
    font-size: 14px;
    transition: all .2s;
  }
  .glass-switch:hover { color: #fff; border-color: rgba(70,217,255,.55); background: rgba(70,217,255,.08); transform: translateY(-1px); }

  .footer-link { display: inline-flex; align-items: center; gap: 6px; color: #A5B4C8; font-size: 14px; line-height: 1.4; transition: color .2s, transform .15s; }
  .footer-link:hover { color: #EAF5FF; transform: translateX(2px); }
  .footer-sub { height: 1px; background: linear-gradient(90deg, transparent, rgba(70,217,255,.45), transparent); }

  @media (max-width: 1024px) {
    .desktop-search { justify-content: flex-end; }
    .search-wrap { max-width: 420px; }
    .step-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
    .guide-panel-row { grid-template-columns: 1fr; }
    .guide-panel-cell:nth-child(even) { border-left: 0; }
    .section-space { padding-top: 72px; padding-bottom: 72px; }
  }
  @media (max-width: 767px) {
    .header-nav { display: none !important; }
    .search-key-hint { display: none; }
    .section-space { padding-top: 60px; padding-bottom: 60px; }
    .banner-title { font-size: 32px; }
    .entry-card { grid-template-columns: 1fr; }
    .entry-thumb { width: 100%; height: 146px; }
    .guide-panel { grid-template-columns: 1fr; }
    .step-grid { grid-template-columns: 1fr; }
    .cta-strip { padding: 30px 24px; }
  }

/* roulang page: article */
:root {
  --page-bg: #070D1A;
  --panel-bg: #0B1424;
  --panel-2: #0D1830;
  --blue: #2F7BFF;
  --cyan: #46D9FF;
  --amber: #E7B95B;
  --green: #4ADE80;
  --danger: #FB7185;
  --text-hi: #EAF0FA;
  --text-body: #C7D2E0;
  --text-muted: #7E8FA7;
  --line: rgba(255,255,255,.08);
  --line-soft: rgba(255,255,255,.05);
  --glass: rgba(17,30,58,.55);
  --radius-lg: 18px;
  --radius-md: 14px;
  --shadow-card: 0 12px 40px rgba(0,0,0,.3);
  --font-cn: "PingFang SC","Microsoft YaHei","微软雅黑","Source Han Sans SC",sans-serif;
  --font-num: Inter,"DIN Alternate",sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-cn);
  background: var(--page-bg);
  color: var(--text-hi);
  font-size: 15px;
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(700px 420px at 88% -5%, rgba(70,217,255,.13), transparent 65%),
    radial-gradient(900px 620px at -8% 108%, rgba(47,123,255,.14), transparent 60%),
    repeating-linear-gradient(0deg, rgba(255,255,255,.025) 0px, rgba(255,255,255,.025) 1px, transparent 1px, transparent 42px),
    repeating-linear-gradient(90deg, rgba(255,255,255,.02) 0px, rgba(255,255,255,.02) 1px, transparent 1px, transparent 42px);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
}

input,
select,
textarea {
  font-family: inherit;
  outline: none;
}

::selection {
  background: rgba(47,123,255,.3);
  color: #fff;
}

.wrap {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 24px;
}

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(7,13,26,.8);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom: 1px solid rgba(255,255,255,.06);
  transition: background .3s ease, box-shadow .3s ease;
}

.site-header.is-scrolled {
  background: rgba(4,8,16,.94);
  box-shadow: 0 12px 34px rgba(0,0,0,.35);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(47,123,255,.2), rgba(70,217,255,.06));
  border: 1px solid rgba(70,217,255,.25);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.14), 0 8px 24px rgba(47,123,255,.16);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .2px;
  color: #fff;
}

.brand-sub {
  font-size: 11px;
  color: rgba(234,240,250,.58);
  margin-top: 4px;
  letter-spacing: .4px;
  white-space: nowrap;
}

.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 660px;
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.055);
  border: 1px solid rgba(255,255,255,.12);
  transition: all .25s ease;
}

.search-wrap:focus-within {
  background: rgba(255,255,255,.1);
  border-color: rgba(70,217,255,.66);
  box-shadow: 0 0 0 4px rgba(70,217,255,.12), 0 8px 26px rgba(0,0,0,.2);
}

.search-wrap input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  color: var(--text-hi);
  font-size: 14px;
  line-height: 1.4;
}

.search-wrap input::placeholder {
  color: rgba(142,160,184,.75);
}

.search-key-hint {
  flex-shrink: 0;
  padding: 2px 9px;
  border-radius: 6px;
  font-size: 12px;
  font-family: var(--font-num);
  color: rgba(234,240,250,.5);
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.08);
  letter-spacing: 1px;
}

.header-catbar {
  display: none;
  align-items: center;
  gap: 4px;
  padding: 0 0 14px;
  overflow-x: auto;
  scrollbar-width: none;
}

.header-catbar::-webkit-scrollbar {
  display: none;
}

@media (min-width: 768px) {
  .header-catbar {
    display: flex;
    border-top: 1px solid rgba(255,255,255,.05);
    padding-top: 12px;
  }
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: rgba(234,240,250,.72);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: all .22s ease;
}

.nav-pill:hover {
  color: var(--cyan);
  background: rgba(70,217,255,.08);
  border-color: rgba(70,217,255,.2);
}

.nav-pill.current {
  color: #fff;
  background: rgba(70,217,255,.14);
  border-color: rgba(70,217,255,.3);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 18px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 6px 28px rgba(47,123,255,.45);
  transition: filter .2s ease, transform .2s ease, box-shadow .2s ease;
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 8px 34px rgba(47,123,255,.52);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 18px rgba(47,123,255,.4);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 10px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.16);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: all .22s ease;
}

.btn-secondary:hover {
  border-color: var(--cyan);
  background: rgba(70,217,255,.1);
  color: var(--cyan);
}

.hamburger-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  color: #fff;
}

.ham-line {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .28s ease, opacity .2s ease;
}

.ham-line + .ham-line {
  margin-top: 4px;
}

.site-header.mobile-open .ham-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-header.mobile-open .ham-line:nth-child(2) {
  opacity: 0;
}

.site-header.mobile-open .ham-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  background: rgba(7,13,26,.98);
  border-top: 1px solid rgba(255,255,255,.06);
  padding: 14px 0 22px;
}

.site-header.mobile-open .mobile-menu {
  display: block;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 14px;
  border-radius: 12px;
  color: rgba(234,240,250,.8);
  font-size: 14px;
  font-weight: 500;
  transition: all .2s ease;
}

.mobile-nav-link:hover {
  color: var(--cyan);
  background: rgba(70,217,255,.08);
}

/* glass card */
.glass-card {
  background: var(--glass);
  border: 1px solid rgba(255,255,255,.09);
  border-top-color: rgba(255,255,255,.16);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.08);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  transition: border-color .25s ease, transform .25s ease;
}

/* breadcrumb */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  padding: 18px 0 6px;
}

.breadcrumb a {
  color: rgba(234,240,250,.62);
  transition: color .2s ease;
}

.breadcrumb a:hover {
  color: var(--cyan);
}

.breadcrumb .current {
  color: rgba(234,240,250,.88);
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* article hero */
.article-head {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border-radius: 22px;
}

@media (min-width: 768px) {
  .article-head {
    padding: 40px;
  }
}

.article-head-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(115deg, rgba(7,13,26,.96) 10%, rgba(7,13,26,.78) 58%, rgba(17,30,58,.66)),
    linear-gradient(180deg, rgba(70,217,255,.05), transparent),
    url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
}

.article-head-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(420px 160px at 90% 0%, rgba(70,217,255,.14), transparent 70%),
    radial-gradient(500px 240px at 10% 100%, rgba(47,123,255,.12), transparent 70%);
}

.badge-line {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--cyan);
  background: rgba(70,217,255,.09);
  border: 1px solid rgba(70,217,255,.22);
}

.article-title {
  position: relative;
  z-index: 1;
  margin: 18px 0 16px;
  font-size: 30px;
  line-height: 1.32;
  font-weight: 800;
  color: #fff;
  letter-spacing: .2px;
}

@media (min-width: 768px) {
  .article-title {
    font-size: 38px;
    max-width: 900px;
  }
}

.article-meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 6px;
  font-size: 13px;
  color: rgba(234,240,250,.6);
}

.article-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: rgba(234,240,250,.35);
  align-self: center;
}

/* layout */
.left-pane {
  min-width: 0;
}

.article-body {
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.9;
  overflow-wrap: break-word;
}

.article-body > * + * {
  margin-top: 1.25em;
}

.article-body p {
  margin: 0 0 22px;
  line-height: 1.95;
}

.article-body h2 {
  position: relative;
  font-size: 24px;
  line-height: 1.45;
  color: #fff;
  font-weight: 700;
  margin: 42px 0 18px;
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
}

.article-body h3 {
  font-size: 20px;
  line-height: 1.5;
  color: #fff;
  font-weight: 650;
  margin: 34px 0 14px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 24px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body a {
  color: var(--cyan);
  border-bottom: 1px dashed rgba(70,217,255,.5);
  transition: border-color .2s ease;
}

.article-body a:hover {
  border-bottom-color: var(--cyan);
}

.article-body blockquote {
  margin: 28px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--cyan);
  background: rgba(70,217,255,.06);
  color: rgba(234,240,250,.72);
  border-radius: 0 12px 12px 0;
}

.article-body img {
  border-radius: 12px;
  margin: 24px 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 12px;
  overflow: hidden;
  font-size: 14px;
}

.article-body th {
  background: rgba(47,123,255,.14);
  color: #fff;
  font-weight: 600;
  text-align: left;
  padding: 12px 14px;
}

.article-body td {
  padding: 11px 14px;
  border-top: 1px solid rgba(255,255,255,.05);
}

.article-body tr:nth-child(even) td {
  background: rgba(255,255,255,.03);
}

.article-body code {
  background: rgba(70,217,255,.12);
  color: var(--cyan);
  padding: 2px 7px;
  border-radius: 6px;
  font-size: .9em;
}

.article-body pre {
  background: #0B1424;
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 12px;
  padding: 18px;
  overflow: auto;
  margin: 24px 0;
}

.article-body pre code {
  background: transparent;
  color: var(--text-hi);
  padding: 0;
}

/* notice tip */
.notice-tip {
  display: flex;
  gap: 12px;
  padding: 16px 18px;
  border-radius: 14px;
  background: rgba(70,217,255,.07);
  border: 1px solid rgba(70,217,255,.16);
  color: rgba(234,240,250,.68);
  font-size: 13px;
  margin-bottom: 28px;
}

.notice-tip svg {
  flex-shrink: 0;
  margin-top: 3px;
}

/* tag row */
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.07);
}

.tag-item {
  display: inline-flex;
  align-items: center;
  padding: 6px 13px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--cyan);
  background: rgba(70,217,255,.08);
  border: 1px solid rgba(70,217,255,.16);
  transition: all .2s ease;
}

.tag-item:hover {
  background: rgba(70,217,255,.18);
}

/* prev next */
.prevnext-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 22px;
}

@media (min-width: 768px) {
  .prevnext-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.pn-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px;
  border-radius: 14px;
  background: rgba(255,255,255,.045);
  border: 1px solid rgba(255,255,255,.08);
  transition: all .22s ease;
}

.pn-card:hover {
  border-color: rgba(70,217,255,.4);
  background: rgba(70,217,255,.06);
  transform: translateY(-2px);
}

.pn-label {
  font-size: 12px;
  color: var(--text-muted);
}

.pn-title {
  color: rgba(234,240,250,.88);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
}

/* side */
.side-card {
  padding: 20px;
  margin-top: 18px;
  border-radius: 16px;
  background: rgba(15,26,46,.72);
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.side-label {
  display: block;
  margin-bottom: 14px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  padding-left: 12px;
  border-left: 3px solid var(--cyan);
  line-height: 1.4;
}

.toc-list {
  list-style: none;
  padding: 0;
}

.toc-list li + li {
  margin-top: 2px;
}

.toc-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 9px;
  font-size: 13px;
  color: rgba(234,240,250,.65);
  border-left: 2px solid transparent;
  transition: all .18s ease;
}

.toc-list a span {
  font-family: var(--font-num);
  color: rgba(234,240,250,.35);
  font-size: 12px;
}

.toc-list a:hover {
  color: var(--cyan);
  background: rgba(70,217,255,.06);
  border-left-color: var(--cyan);
}

.side-help-desc {
  font-size: 13px;
  color: rgba(234,240,250,.6);
  margin-bottom: 14px;
  line-height: 1.8;
}

.side-banner {
  position: relative;
  min-height: 150px;
  overflow: hidden;
  padding: 22px;
  border-radius: 16px;
  background-image: linear-gradient(155deg, rgba(7,13,26,.9), rgba(13,30,60,.76)), url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
}

.side-banner h3 {
  position: relative;
  font-size: 17px;
  color: #fff;
  font-weight: 700;
  line-height: 1.5;
}

.side-banner p {
  position: relative;
  font-size: 12px;
  color: rgba(234,240,250,.62);
  line-height: 1.7;
  margin: 8px 0 12px;
}

.side-banner a {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--cyan);
}

.side-banner a:hover {
  text-decoration: underline;
}

/* related */
.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 32px 0 18px;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
}

.section-title::before {
  content: "";
  width: 4px;
  height: 20px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--blue));
}

.related-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: 14px;
  background: rgba(255,255,255,.035);
  border: 1px solid rgba(255,255,255,.08);
  transition: all .22s ease;
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: rgba(70,217,255,.32);
  background: rgba(255,255,255,.055);
}

.related-card-cover {
  aspect-ratio: 4 / 3;
  background: rgba(255,255,255,.05);
  overflow: hidden;
}

.related-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .35s ease;
}

.related-card:hover .related-card-cover img {
  transform: scale(1.04);
}

.related-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px 16px 18px;
}

.related-card-time {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 7px;
}

.related-card-title {
  font-size: 16px;
  font-weight: 650;
  color: #fff;
  line-height: 1.55;
  margin-bottom: 8px;
}

.related-card-summary {
  font-size: 12px;
  color: rgba(234,240,250,.55);
  line-height: 1.75;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

.empty-state {
  padding: 28px 22px;
  color: rgba(234,240,250,.5);
  font-size: 13px;
  text-align: center;
  background: rgba(255,255,255,.03);
}

/* cta band */
.cta-band {
  position: relative;
  overflow: hidden;
  margin-top: 24px;
  padding: 28px 26px;
  border-radius: 18px;
  text-align: center;
}

@media (min-width: 768px) {
  .cta-band {
    padding: 38px 36px;
  }
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(440px 220px at 50% -30%, rgba(47,123,255,.24), transparent 70%);
  pointer-events: none;
}

.cta-band h2 {
  position: relative;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
}

.cta-band p {
  position: relative;
  font-size: 14px;
  color: rgba(234,240,250,.64);
  margin-top: 10px;
}

.cta-band .btn-primary {
  position: relative;
  margin-top: 20px;
}

/* footer */
.footer-sub {
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(47,123,255,.6), rgba(70,217,255,.9), rgba(47,123,255,.6), transparent);
  opacity: .7;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
  transition: all .2s ease;
}

.footer-link:hover {
  color: var(--cyan);
}

/* responsive article */
@media (max-width: 1023px) {
  .article-title {
    font-size: 32px;
  }
}

@media (max-width: 640px) {
  .wrap {
    padding-inline: 16px;
  }

  .article-body {
    font-size: 15px;
  }

  .article-body h2 {
    font-size: 20px;
  }

  .article-head {
    border-radius: 16px;
  }

  .related-card-summary {
    -webkit-line-clamp: 1;
  }
}

@media (max-width: 480px) {
  .article-title {
    font-size: 26px;
  }

  .breadcrumb {
    font-size: 12px;
  }
}

/* roulang page: category2 */
:root{
  --bg:#070D1A;
  --bg2:#0B1424;
  --card-bg:rgba(17,30,58,0.55);
  --card-border:rgba(255,255,255,0.08);
  --card-border-light:rgba(255,255,255,0.24);
  --blue:#2F7BFF;
  --cyan:#46D9FF;
  --gold:#E7B95B;
  --green:#4ADE80;
  --red:#FB7185;
  --headline:#EAF0FA;
  --body:#C7D2E0;
  --muted:#7E8FA7;
  --font-cn:"PingFang SC","Microsoft YaHei","微软雅黑","Source Han Sans SC",sans-serif;
  --font-en:Inter,"DIN Alternate",sans-serif;
  --shadow:0 12px 40px rgba(0,0,0,0.3);
  --glow:0 6px 30px rgba(47,123,255,0.45);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:#070D1A;
  background-image:
    radial-gradient(820px 480px at 92% -10%, rgba(34,97,255,0.16), transparent 60%),
    radial-gradient(700px 420px at 8% 28%, rgba(70,217,255,0.06), transparent 55%),
    linear-gradient(rgba(122,160,215,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122,160,215,0.028) 1px, transparent 1px);
  background-size:auto, auto, 48px 48px, 48px 48px;
  color:var(--body);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
input,select,textarea{font-family:inherit}
.wrap{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
.glass-card{
  background:var(--card-bg);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border:1px solid var(--card-border);
  border-top:1px solid rgba(255,255,255,0.12);
  border-radius:18px;
  box-shadow:var(--shadow);
  transition:border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.glass-card:hover{
  border-color:rgba(255,255,255,0.3);
  transform:translateY(-2px);
  box-shadow:0 16px 48px rgba(0,0,0,0.38);
}
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(7,13,26,0.68);
  backdrop-filter:blur(18px) saturate(150%);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,0.06);
  transition:background .3s ease;
}
.site-header.scrolled{background:rgba(5,10,20,0.86)}
.brand-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:40px;height:40px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(145deg, rgba(70,217,255,0.12), rgba(47,123,255,0.08));
  border:1px solid rgba(70,217,255,0.32);
  box-shadow:0 0 18px rgba(47,123,255,0.18);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:19px;font-weight:800;color:#F4F8FF;letter-spacing:.2px}
.brand-sub{font-size:11px;color:rgba(190,210,235,0.72);letter-spacing:.4px}
.search-zone{position:relative;flex:1;display:flex;justify-content:center;min-width:0}
.search-wrap{
  width:100%;max-width:660px;height:46px;display:flex;align-items:center;gap:10px;
  padding:0 14px;border-radius:13px;
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.12);
  transition:border-color .2s ease,background .2s ease,box-shadow .2s ease;
}
.search-wrap:focus-within{
  border-color:rgba(70,217,255,0.7);
  background:rgba(255,255,255,0.1);
  box-shadow:0 0 0 3px rgba(47,123,255,0.18), 0 0 18px rgba(70,217,255,0.18);
}
.search-wrap input{
  flex:1;border:0;outline:0;background:transparent;color:#E8EFFB;font-size:14px;min-width:0;
}
.search-wrap input::placeholder{color:#7A8DA8}
.search-key-hint{
  flex-shrink:0;font-size:11px;color:#A5B6CD;border:1px solid rgba(255,255,255,0.18);border-radius:6px;
  padding:2px 7px;background:rgba(255,255,255,0.04);
}
.category-pills{
  position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%);
  display:none;align-items:center;gap:8px;white-space:nowrap;z-index:5;
}
@media(min-width:768px){.category-pills{display:flex}}
.category-pills a{
  padding:5px 18px;border-radius:999px;font-size:13px;color:#C6D5E8;
  background:rgba(255,255,255,0.04);border:1px solid transparent;transition:.2s;
}
.category-pills a:hover{color:#46D9FF;background:rgba(70,217,255,0.1)}
.category-pills a.active{
  color:#46D9FF;background:rgba(47,123,255,0.18);
  border-color:rgba(70,217,255,0.5);box-shadow:0 0 18px rgba(47,123,255,0.18);
}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:linear-gradient(135deg,#2F7BFF,#46D9FF);
  color:#fff;font-weight:600;border-radius:10px;padding:11px 20px;font-size:14px;
  border:0;cursor:pointer;box-shadow:var(--glow);transition:.2s;
}
.btn-primary:hover{filter:brightness(1.1);box-shadow:0 8px 38px rgba(47,123,255,0.6)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 18px rgba(47,123,255,0.4)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;border-radius:10px;padding:10px 20px;
  background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.2);color:#D7E4F5;
  font-size:14px;transition:.2s;
}
.btn-ghost:hover{border-color:#46D9FF;color:#46D9FF;box-shadow:0 0 0 3px rgba(70,217,255,0.1)}
.hamburger-btn{
  width:44px;height:44px;border-radius:12px;border:1px solid rgba(255,255,255,0.14);
  background:rgba(255,255,255,0.05);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.hamburger-btn span{width:18px;height:2px;background:#DCE7F5;border-radius:2px;transition:.25s}
.hamburger-btn.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger-btn.open span:nth-child(2){opacity:0}
.hamburger-btn.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{
  display:none;background:rgba(5,10,20,0.96);backdrop-filter:blur(20px);
  border-top:1px solid rgba(255,255,255,0.06);padding:18px 20px 24px;
}
.mobile-menu.open{display:block}
.mobile-menu .search-wrap{background:rgba(255,255,255,0.07);max-width:none}
.mobile-nav-links{display:flex;flex-direction:column;gap:2px;margin-top:14px}
.mobile-nav-links a{
  padding:11px 12px;border-radius:10px;color:#C7D2E0;font-size:15px;
}
.mobile-nav-links a.active{background:rgba(47,123,255,0.14);color:#46D9FF}
.cat-hero{
  position:relative;min-height:300px;padding:112px 0 64px;overflow:hidden;
  background-image:linear-gradient(85deg,rgba(4,8,16,.92) 0%,rgba(4,8,16,.74) 55%,rgba(4,8,16,.45) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.cat-hero:after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(480px 240px at 82% 20%, rgba(70,217,255,.16), transparent 70%);
}
.cat-hero .wrap{position:relative;z-index:2}
.breadcrumb{font-size:13px;color:#8FA0B8;margin-bottom:18px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.breadcrumb a{transition:.2s}
.breadcrumb a:hover{color:#46D9FF}
.breadcrumb i{font-style:normal;color:#465A75}
.cat-hero h1{
  margin:0 0 16px;color:#F5F9FF;font-size:clamp(32px,4vw,52px);font-weight:800;line-height:1.18;
}
.cat-hero h1 .accent{color:#46D9FF}
.hero-desc{max-width:720px;color:#C7D2E0;font-size:16px;line-height:1.9}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.hero-flag{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;color:#BFEEFF;background:rgba(70,217,255,.1);
  border:1px solid rgba(70,217,255,.32);padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.section{position:relative;padding:80px 0}
@media(max-width:520px){.section{padding:56px 0}}
.eyebrow{font-size:13px;font-weight:600;letter-spacing:2px;color:#46D9FF;margin-bottom:8px}
.h2{font-size:clamp(25px,3vw,32px);line-height:1.3;color:#F0F5FC;font-weight:700;margin:0 0 12px}
.lead-text{color:#93A8C0;font-size:15px;max-width:760px}
.lead-text strong{color:#D9E6F5;font-weight:600}
.main-list-card{
  display:grid;grid-template-columns:96px 1fr;gap:20px;align-items:start;
  padding:24px;border-radius:18px;background:rgba(255,255,255,0.035);
  border:1px solid rgba(255,255,255,0.055);transition:.25s;
}
.main-list-card:hover{transform:translateY(-3px);background:rgba(255,255,255,0.055);border-color:rgba(70,217,255,0.3)}
@media(min-width:640px){.main-list-card{grid-template-columns:96px 1fr}}
.list-icon{
  width:96px;height:96px;border-radius:20px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg, rgba(47,123,255,0.16), rgba(70,217,255,0.08));
  border:1px solid rgba(70,217,255,0.4);color:#46D9FF;
}
.list-card-title{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:6px}
.list-card-title h3{margin:0;font-size:20px;font-weight:700;color:#EAF1FB}
.badge{
  display:inline-flex;align-items:center;font-size:12px;padding:3px 12px;border-radius:999px;
  color:#C8E7FF;background:rgba(70,217,255,0.1);border:1px solid rgba(70,217,255,0.26);
}
.badge.gold{color:#FFE2A7;background:rgba(231,185,91,0.1);border-color:rgba(231,185,91,0.35)}
.list-card-desc{color:#B6C5D9;font-size:15px;line-height:1.8;margin:0 0 10px}
.list-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:#46D9FF;
}
.list-arrow svg{width:15px;height:15px;transition:transform .2s}
.list-arrow:hover svg{transform:translateX(4px)}
.aside-box{
  background:rgba(255,255,255,0.035);border:1px solid rgba(255,255,255,0.07);
  border-radius:18px;padding:22px;margin-bottom:16px;
}
.aside-box h3{color:#EAF1FB;font-size:16px;font-weight:700;margin:0 0 12px}
.aside-box p{color:#9EB0CA;font-size:14px;line-height:1.8;margin:0}
.sub-nav{display:flex;flex-direction:column;gap:6px;margin-top:4px}
.sub-nav a{
  display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;
  font-size:14px;color:#BFD1E6;transition:.2s;
}
.sub-nav a:before{content:"";width:5px;height:5px;border-radius:50%;background:#46D9FF;opacity:.6}
.sub-nav a:hover{background:rgba(70,217,255,0.08);color:#46D9FF}
.click-card{
  display:flex;align-items:center;gap:12px;padding:14px;border-radius:14px;
  background:rgba(47,123,255,0.09);border:1px solid rgba(70,217,255,0.2);transition:.2s;
}
.click-card:hover{border-color:rgba(70,217,255,0.5);box-shadow:0 0 20px rgba(70,217,255,0.08)}
.faq-item{
  border:1px solid rgba(255,255,255,0.06);border-radius:16px;
  background:rgba(17,30,58,0.42);margin-bottom:12px;overflow:hidden;transition:.25s;
}
.faq-item:hover{border-color:rgba(70,217,255,0.28)}
.faq-q{
  width:100%;display:flex;justify-content:space-between;align-items:center;
  padding:18px 22px;color:#DDE8F7;font-size:16px;font-weight:600;cursor:pointer;
  border:0;background:transparent;text-align:left;transition:.2s;gap:16px;
}
.faq-q:hover{color:#46D9FF}
.faq-icon{width:28px;height:28px;border-radius:50%;border:1px solid rgba(70,217,255,0.3);color:#46D9FF;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a-inner{padding:0 22px 22px;color:#AFBED2;font-size:15px;line-height:1.9}
.faq-open .faq-a{max-height:320px}
.faq-open .faq-icon{transform:rotate(45deg)}
.cat-link-card{
  display:flex;align-items:center;justify-content:center;gap:10px;text-align:center;
  min-height:58px;padding:14px 26px;border-radius:14px;font-weight:600;color:#D1E2F4;
  background:rgba(255,255,255,0.055);border:1px solid rgba(255,255,255,0.12);
  transition:.25s;
}
.cat-link-card:hover{color:#46D9FF;border-color:rgba(70,217,255,0.6);background:rgba(70,217,255,0.08)}
.footer-sub{height:1px;background:linear-gradient(90deg,transparent,rgba(70,217,255,0.5),transparent)}
.footer-link{color:#7E8FA7;font-size:14px;line-height:1.9;transition:.2s}
.footer-link:hover{color:#46D9FF}
.back-to-top{
  position:fixed;right:22px;bottom:25px;z-index:50;width:46px;height:46px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;background:rgba(47,123,255,0.2);
  border:1px solid rgba(70,217,255,0.45);color:#46D9FF;opacity:0;visibility:hidden;transition:.3s;
}
.back-to-top.show{opacity:1;visibility:visible}
.back-to-top:hover{background:rgba(47,123,255,0.3)}
body{padding-top:73px}
@media(max-width:768px){
  .search-zone{display:none}
  .cat-hero{min-height:auto;padding:46px 0 40px}
}
@media(max-width:520px){
  .reduce-on-mobile h2{font-size:26px}
  .main-list-card{grid-template-columns:64px 1fr;padding:18px}
  .list-icon{width:64px;height:64px;border-radius:16px}
}
@media(max-width:480px){
  .btn-primary,.btn-ghost{min-height:46px}
  .cat-hero h1{font-size:30px}
}
::selection{background:rgba(70,217,255,.25)}

/* roulang page: category3 */
:root {
            --bg-deep: #070D1A;
            --bg-panel: #0B1424;
            --blue: #2F7BFF;
            --cyan: #46D9FF;
            --gold: #E7B95B;
            --green: #4ADE80;
            --pink: #FB7185;
            --text-main: #C7D2E0;
            --text-soft: #7E8FA7;
            --line-soft: rgba(255, 255, 255, 0.08);
            --glass-bg: rgba(17, 30, 58, 0.55);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background-color: var(--bg-deep);
            color: var(--text-main);
            font-family: "PingFang SC", "Microsoft YaHei", "微软雅黑", "Source Han Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.8;
            background-image:
                radial-gradient(900px 520px at 88% -8%, rgba(47, 123, 255, 0.20), transparent 60%),
                radial-gradient(780px 420px at -10% 28%, rgba(70, 217, 255, 0.10), transparent 55%),
                linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
            background-size: auto, auto, 26px 26px, 26px 26px;
            background-attachment: fixed;
        }

        h1, h2, h3, h4, p, figure {
            margin: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        img {
            max-width: 100%;
            display: block;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        input, select, textarea {
            font-family: inherit;
        }

        section[id] {
            scroll-margin-top: 150px;
        }

        .wrap {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        ::selection {
            background: rgba(70, 217, 255, 0.28);
            color: #fff;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid rgba(70, 217, 255, 0.85);
            outline-offset: 2px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 70;
            background: rgba(7, 13, 26, 0.80);
            backdrop-filter: blur(16px) saturate(140%);
            -webkit-backdrop-filter: blur(16px) saturate(140%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.20);
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            min-width: 0;
        }

        .brand-mark {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex: 0 0 auto;
            border-radius: 12px;
            border: 1px solid rgba(70, 217, 255, 0.35);
            background: linear-gradient(135deg, rgba(47, 123, 255, 0.18), rgba(70, 217, 255, 0.08));
            box-shadow: 0 0 18px rgba(47, 123, 255, 0.15);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.25;
            min-width: 0;
        }

        .brand-name {
            font-size: 18px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: #EAF0FA;
            white-space: nowrap;
        }

        .brand-sub {
            font-size: 11px;
            color: rgba(206, 222, 241, 0.62);
            letter-spacing: 0.05em;
            margin-top: 3px;
            white-space: nowrap;
        }

        .search-wrap {
            width: 100%;
            max-width: 660px;
            height: 46px;
            display: flex;
            align-items: center;
            gap: 9px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: 12px;
            padding: 0 12px;
            transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
        }

        .search-wrap:focus-within {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(70, 217, 255, 0.55);
            box-shadow: 0 0 0 3px rgba(70, 217, 255, 0.13);
        }

        .search-wrap input {
            background: transparent;
            border: 0;
            outline: none;
            color: #EAF0FA;
            width: 100%;
            height: 100%;
            font-size: 14px;
        }

        .search-wrap input::placeholder {
            color: rgba(206, 222, 241, 0.55);
        }

        .search-key-hint {
            color: rgba(206, 222, 241, 0.48);
            border: 1px solid rgba(255, 255, 255, 0.13);
            border-radius: 6px;
            padding: 1px 7px;
            font-size: 12px;
            flex: 0 0 auto;
            letter-spacing: 0.04em;
        }

        .category-strip {
            scrollbar-width: none;
            gap: 8px;
        }

        .category-strip::-webkit-scrollbar {
            display: none;
        }

        .nav-pill {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            white-space: nowrap;
            height: 34px;
            padding: 0 15px;
            border-radius: 999px;
            font-size: 14px;
            color: rgba(213, 230, 248, 0.75);
            border: 1px solid transparent;
            transition: all 0.2s ease;
        }

        .nav-pill:hover {
            color: #46D9FF;
            background: rgba(70, 217, 255, 0.08);
        }

        .nav-pill.active {
            color: #FFFFFF;
            background: rgba(47, 123, 255, 0.18);
            border-color: rgba(47, 123, 255, 0.5);
            box-shadow: 0 0 16px rgba(47, 123, 255, 0.18);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 10px;
            font-size: 14px;
            color: #fff;
            background: linear-gradient(135deg, #2F7BFF, #46D9FF);
            border: 0;
            font-weight: 600;
            box-shadow: 0 6px 24px rgba(47, 123, 255, 0.40);
            transition: transform 0.15s, box-shadow 0.15s, filter 0.15s;
            min-height: 44px;
            padding-left: 16px;
            padding-right: 16px;
            line-height: 1;
        }

        .btn-primary:hover {
            filter: brightness(1.08);
            box-shadow: 0 8px 32px rgba(47, 123, 255, 0.54);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 4px 16px rgba(47, 123, 255, 0.38);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.17);
            color: #E6F0FB;
            font-size: 14px;
            min-height: 44px;
            padding-left: 16px;
            padding-right: 16px;
            transition: all 0.2s ease;
            font-weight: 500;
        }

        .btn-secondary:hover {
            border-color: rgba(70, 217, 255, 0.6);
            background: rgba(70, 217, 255, 0.08);
            color: #FFFFFF;
        }

        .hamburger-btn {
            display: inline-flex;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            padding: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.10);
            transition: background 0.2s;
        }

        .hamburger-btn span {
            display: block;
            height: 2px;
            border-radius: 2px;
            background: #EAF0FA;
            transition: transform 0.25s, opacity 0.25s;
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            background: rgba(11, 20, 36, 0.97);
            border-top: 1px solid rgba(255, 255, 255, 0.07);
        }

        .glass-card {
            background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 28%), var(--glass-bg);
            backdrop-filter: blur(16px) saturate(140%);
            -webkit-backdrop-filter: blur(16px) saturate(140%);
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: 18px;
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 12px 40px rgba(0, 0, 0, 0.30);
            transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
        }

        .glass-card:hover {
            border-color: rgba(255, 255, 255, 0.30);
            transform: translateY(-2px);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.10), 0 18px 46px rgba(0, 0, 0, 0.36);
        }

        .glass-card[data-hover="on"]:hover {
            border-color: rgba(70, 217, 255, 0.38);
        }

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: #46D9FF;
            letter-spacing: 0.04em;
            background: rgba(70, 217, 255, 0.08);
            padding: 5px 12px;
            border-radius: 999px;
            border: 1px solid rgba(70, 217, 255, 0.15);
        }

        .text-gradient {
            background: linear-gradient(92deg, #EAF0FA 10%, #46D9FF 90%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .icon-chip {
            width: 64px;
            height: 64px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(47, 123, 255, 0.22), rgba(70, 217, 255, 0.10));
            border: 1px solid rgba(70, 217, 255, 0.28);
            box-shadow: 0 0 18px rgba(70, 217, 255, 0.10);
            flex: 0 0 auto;
        }

        .arrow-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: #46D9FF;
            font-size: 14px;
            font-weight: 500;
            transition: color 0.2s, gap 0.2s;
        }

        .arrow-link:hover {
            color: #FFFFFF;
            gap: 9px;
        }

        .category-hero {
            position: relative;
            overflow: hidden;
        }

        .category-hero:before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center 36%;
            transform: scale(1.02);
            opacity: 0.95;
        }

        .category-hero:after {
            content: "";
            position: absolute;
            inset: 0;
            background:
                linear-gradient(112deg, rgba(7, 13, 26, 0.97) 20%, rgba(7, 13, 26, 0.82) 58%, rgba(7, 13, 26, 0.52) 100%),
                radial-gradient(85% 90% at 82% 0%, rgba(47, 123, 255, 0.34), transparent 60%),
                radial-gradient(55% 70% at 8% 90%, rgba(70, 217, 255, 0.12), transparent 60%);
        }

        .category-hero>.wrap {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            color: rgba(206, 222, 241, 0.58);
            font-size: 13px;
        }

        .breadcrumb a:hover {
            color: #46D9FF;
        }

        .hero-region-card {
            background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)), rgba(11, 20, 36, 0.66);
            border: 1px solid rgba(255, 255, 255, 0.13);
            border-radius: 18px;
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.10), 0 18px 50px rgba(0, 0, 0, 0.35);
            backdrop-filter: blur(12px);
        }

        .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 999px;
            background: var(--green);
            box-shadow: 0 0 8px rgba(74, 222, 128, 0.8);
        }

        .aside-card {
            position: sticky;
            top: 138px;
        }

        .aside-menu {
            display: grid;
            gap: 8px;
        }

        .aside-menu a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(213, 230, 248, 0.70);
            font-size: 14px;
            padding: 9px 12px;
            border-radius: 12px;
            border: 1px solid transparent;
            transition: all 0.2s ease;
        }

        .aside-menu a:hover {
            background: rgba(70, 217, 255, 0.08);
            border-color: rgba(70, 217, 255, 0.14);
            color: #FFFFFF;
        }

        .menu-list {
            display: grid;
            gap: 12px;
        }

        .menu-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            list-style: none;
        }

        .feature-dot {
            width: 18px;
            height: 18px;
            border-radius: 50%;
            flex: 0 0 auto;
            margin-top: 4px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            font-weight: 700;
            color: #06101F;
            background: linear-gradient(135deg, #46D9FF, #2F7BFF);
            box-shadow: 0 0 10px rgba(70, 217, 255, 0.35);
        }

        .cover-panel {
            background: rgba(16, 30, 54, 0.80);
            border-radius: 18px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.10);
            box-shadow: 0 18px 46px rgba(0, 0, 0, 0.32);
        }

        .faq-item {
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: 16px;
            background: rgba(17, 30, 58, 0.42);
            overflow: hidden;
            transition: border-color 0.2s;
        }

        .faq-item.open {
            border-color: rgba(70, 217, 255, 0.32);
        }

        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            width: 100%;
            padding: 17px 18px;
            text-align: left;
            background: transparent;
            border: 0;
            color: #EAF0FA;
            font-size: 15px;
            font-weight: 600;
        }

        .faq-q svg {
            flex: 0 0 auto;
            transition: transform 0.25s;
        }

        .faq-item.open .faq-q svg {
            transform: rotate(180deg);
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.22s ease;
        }

        .faq-item.open .faq-body {
            max-height: 300px;
        }

        .faq-answer {
            padding: 0 18px 18px;
            color: #AEBFD2;
            font-size: 14px;
            line-height: 1.8;
        }

        .footer-link {
            color: rgba(206, 222, 241, 0.62);
            font-size: 14px;
            transition: color 0.2s, padding-left 0.2s;
        }

        .footer-link:hover {
            color: #46D9FF;
            padding-left: 4px;
        }

        .footer-sub {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(70, 217, 255, 0.55), rgb(47, 123, 255), rgba(70, 217, 255, 0.55), transparent);
            opacity: 0.7;
        }

        .copy-tag {
            color: rgba(206, 222, 241, 0.48);
        }

        .modal-mask {
            position: fixed;
            inset: 0;
            z-index: 100;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(4, 8, 16, 0.78);
            backdrop-filter: blur(8px);
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.2s ease;
            padding: 20px;
        }

        .modal-mask.open {
            opacity: 1;
            pointer-events: auto;
        }

        .modal-wrap {
            background: rgba(11, 20, 36, 0.96);
            border: 1px solid rgba(255, 255, 255, 0.16);
            border-radius: 20px;
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 30px 80px rgba(0, 0, 0, 0.55);
            width: 100%;
            max-width: 480px;
            padding: 24px;
        }

        .form-label {
            display: block;
            font-size: 13px;
            color: #C7D2E0;
            margin-bottom: 8px;
            font-weight: 500;
        }

        .form-control {
            width: 100%;
            border: 1px solid rgba(255, 255, 255, 0.13);
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.06);
            padding: 11px 13px;
            color: #EAF0FA;
            font-size: 14px;
            outline: none;
            transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
        }

        .form-control:focus {
            border-color: rgba(70, 217, 255, 0.64);
            box-shadow: 0 0 0 3px rgba(70, 217, 255, 0.12);
            background: rgba(255, 255, 255, 0.09);
        }

        .form-control::placeholder {
            color: rgba(206, 222, 241, 0.4);
        }

        .form-error {
            display: none;
            color: var(--pink);
            font-size: 13px;
        }

        .field-check {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 12px;
            color: rgba(206, 222, 241, 0.62);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .category-hero:before {
                background-position: 66% 30%;
            }
        }

        @media (max-width: 767px) {
            .wrap {
                padding-left: 16px;
                padding-right: 16px;
            }

            .category-strip {
                flex-wrap: nowrap;
                overflow-x: auto;
            }

            .category-hero:before {
                background-position: 72% 20%;
            }
        }

        @media (max-width: 520px) {
            .btn-primary {
                font-size: 13px;
                padding-left: 13px;
                padding-right: 13px;
            }

            .icon-chip {
                width: 52px;
                height: 52px;
                border-radius: 14px;
            }

            .modal-wrap {
                padding: 18px;
            }

            .glass-card {
                border-radius: 14px;
            }
        }