/* roulang page: index */
:root {
            --color-primary: #0A0C0E;
            --color-secondary: #6B1D2F;
            --color-accent: #D4AF37;
            --color-bg: #F5F5F0;
            --color-white: #FFFFFF;
            --color-text: #333333;
            --color-heading: #1A1A1A;
            --color-muted: #767676;
            --color-border: #E8E8E8;
            --color-light-gray: #F0F0EB;
            --color-dark-overlay: rgba(10, 12, 14, 0.55);
            --radius-sm: 6px;
            --radius: 8px;
            --radius-lg: 12px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.03);
            --shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 8px 28px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --section-gap: 80px;
            --section-gap-mobile: 48px;
            --nav-height-top: 36px;
            --nav-height-main: 72px;
            --nav-total-height: 108px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--color-secondary);
        }

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== 顶部信息条 ========== */
        .top-bar {
            background: var(--color-primary);
            color: var(--color-accent);
            font-size: 12px;
            height: var(--nav-height-top);
            line-height: var(--nav-height-top);
            position: sticky;
            top: 0;
            z-index: 1001;
            letter-spacing: 0.3px;
        }
        .top-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
        }
        .top-bar__left {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .top-bar__domain {
            color: var(--color-accent);
            font-weight: 500;
            opacity: 0.9;
        }
        .top-bar__tagline {
            color: #999;
            font-size: 11px;
        }
        .top-bar__right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .top-bar__right a {
            color: #ccc;
            font-size: 12px;
            transition: color var(--transition-fast);
        }
        .top-bar__right a:hover {
            color: var(--color-accent);
        }
        .top-bar__divider {
            color: #555;
            font-size: 11px;
        }

        @media (max-width: 768px) {
            .top-bar__tagline {
                display: none;
            }
            .top-bar__right {
                gap: 10px;
            }
        }
        @media (max-width: 480px) {
            .top-bar__domain {
                font-size: 10px;
            }
            .top-bar__right a {
                font-size: 11px;
            }
        }

        /* ========== 主导航 ========== */
        .main-nav {
            background: var(--color-white);
            height: var(--nav-height-main);
            position: sticky;
            top: var(--nav-height-top);
            z-index: 1000;
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition), height var(--transition);
        }
        .main-nav.scrolled {
            box-shadow: var(--shadow);
            height: 60px;
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .main-nav__brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-heading);
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: font-size var(--transition);
        }
        .main-nav.scrolled .main-nav__brand {
            font-size: 18px;
        }
        .main-nav__brand span {
            color: var(--color-secondary);
        }
        .main-nav__links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .main-nav__links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-heading);
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
        }
        .main-nav__links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            transition: width var(--transition);
        }
        .main-nav__links a:hover,
        .main-nav__links a.active {
            color: var(--color-secondary);
        }
        .main-nav__links a.active::after,
        .main-nav__links a:hover::after {
            width: 100%;
        }
        .main-nav__hamburger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            width: 36px;
            height: 36px;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            padding: 4px;
            z-index: 1002;
        }
        .main-nav__hamburger span {
            display: block;
            height: 2px;
            background: var(--color-heading);
            border-radius: 2px;
            transition: var(--transition);
        }
        .main-nav__hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .main-nav__hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .main-nav__hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 768px) {
            .main-nav__links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: var(--color-white);
                flex-direction: column;
                padding: 100px 32px 40px;
                gap: 20px;
                box-shadow: var(--shadow-lg);
                transition: right var(--transition-slow);
                z-index: 1001;
            }
            .main-nav__links.open {
                right: 0;
            }
            .main-nav__links a {
                font-size: 17px;
                padding: 10px 0;
                border-bottom: 1px solid var(--color-border);
                width: 100%;
            }
            .main-nav__hamburger {
                display: flex;
            }
            .main-nav__overlay {
                display: none;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.4);
                z-index: 1000;
            }
            .main-nav__overlay.active {
                display: block;
            }
        }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.jpg') center / cover no-repeat;
            background-attachment: fixed;
            overflow: hidden;
        }
        .hero__overlay {
            position: absolute;
            inset: 0;
            background: var(--color-dark-overlay);
            z-index: 1;
        }
        .hero__content {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
            max-width: 720px;
            padding: 40px 24px;
            animation: fadeInUp 0.8s ease forwards;
        }
        .hero__badge {
            display: inline-block;
            background: rgba(212, 175, 55, 0.2);
            border: 1px solid rgba(212, 175, 55, 0.5);
            color: var(--color-accent);
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
        }
        .hero__title {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 20px;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .hero__title em {
            font-style: normal;
            color: var(--color-accent);
        }
        .hero__desc {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero__cta {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero__stats {
            display: flex;
            gap: 40px;
            justify-content: center;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .hero__stat {
            text-align: center;
        }
        .hero__stat-num {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-accent);
            display: block;
        }
        .hero__stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        @media (max-width: 1024px) {
            .hero__title {
                font-size: 38px;
            }
            .hero {
                min-height: 70vh;
                background-attachment: scroll;
            }
        }
        @media (max-width: 768px) {
            .hero__title {
                font-size: 30px;
            }
            .hero__desc {
                font-size: 15px;
            }
            .hero__stats {
                gap: 24px;
            }
            .hero__stat-num {
                font-size: 26px;
            }
            .hero {
                min-height: 60vh;
            }
        }
        @media (max-width: 480px) {
            .hero__title {
                font-size: 26px;
            }
            .hero__desc {
                font-size: 14px;
                margin-bottom: 24px;
            }
            .hero__cta {
                flex-direction: column;
                align-items: center;
            }
            .hero__stats {
                gap: 16px;
                margin-top: 28px;
            }
            .hero__stat-num {
                font-size: 22px;
            }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ========== 按钮系统 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-fast);
            border: none;
            letter-spacing: 0.3px;
            white-space: nowrap;
            gap: 8px;
        }
        .btn-primary {
            background: var(--color-secondary);
            color: #fff;
            border: 2px solid var(--color-secondary);
        }
        .btn-primary:hover {
            background: #4A1422;
            border-color: #4A1422;
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(107, 29, 47, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-secondary);
            border: 2px solid var(--color-secondary);
        }
        .btn-outline:hover {
            background: var(--color-secondary);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(107, 29, 47, 0.25);
        }
        .btn-ghost {
            background: transparent;
            color: var(--color-accent);
            border: 2px solid rgba(212, 175, 55, 0.6);
        }
        .btn-ghost:hover {
            background: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(212, 175, 55, 0.3);
        }
        .btn-light {
            background: var(--color-white);
            color: var(--color-heading);
            border: 2px solid var(--color-white);
        }
        .btn-light:hover {
            background: #f0f0f0;
            border-color: #f0f0f0;
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }
        .btn-lg {
            height: 50px;
            padding: 0 36px;
            font-size: 16px;
            border-radius: var(--radius);
        }
        .btn-sm {
            height: 36px;
            padding: 0 16px;
            font-size: 13px;
            border-radius: 4px;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* ========== 通用板块 ========== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section--dark {
            background: var(--color-primary);
            color: #fff;
        }
        .section--light {
            background: var(--color-white);
        }
        .section__header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section__label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-secondary);
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section--dark .section__label {
            color: var(--color-accent);
        }
        .section__title {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-heading);
            line-height: 1.35;
            margin-bottom: 12px;
        }
        .section--dark .section__title {
            color: #fff;
        }
        .section__desc {
            font-size: 16px;
            color: var(--color-muted);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section--dark .section__desc {
            color: rgba(255, 255, 255, 0.7);
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--section-gap-mobile) 0;
            }
            .section__title {
                font-size: 24px;
            }
            .section__header {
                margin-bottom: 32px;
            }
        }
        @media (max-width: 480px) {
            .section__title {
                font-size: 21px;
            }
            .section__desc {
                font-size: 14px;
            }
        }

        /* ========== 拼团玩法板块 ========== */
        .group-buy-info {
            background: var(--color-white);
        }
        .group-buy-info__grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .group-buy-info__card {
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            text-align: center;
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .group-buy-info__card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: transparent;
        }
        .group-buy-info__card--featured {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }
        .group-buy-info__card--featured .group-buy-info__card-title {
            color: #fff;
        }
        .group-buy-info__card--featured .group-buy-info__card-desc {
            color: rgba(255, 255, 255, 0.75);
        }
        .group-buy-info__icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(107, 29, 47, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 24px;
            color: var(--color-secondary);
        }
        .group-buy-info__card--featured .group-buy-info__icon {
            background: rgba(212, 175, 55, 0.2);
            color: var(--color-accent);
        }
        .group-buy-info__card-tag {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--color-accent);
            color: var(--color-primary);
            font-size: 11px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 12px;
            letter-spacing: 0.5px;
        }
        .group-buy-info__card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-heading);
            margin-bottom: 10px;
        }
        .group-buy-info__card-desc {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .group-buy-info__grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .group-buy-info__card {
                padding: 24px 18px;
            }
        }
        @media (max-width: 480px) {
            .group-buy-info__grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== 热门拼单板块 ========== */
        .hot-group {
            background: var(--color-bg);
        }
        .hot-group__grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .hot-group__card {
            background: var(--color-white);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            cursor: pointer;
        }
        .hot-group__card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .hot-group__card-img {
            height: 180px;
            overflow: hidden;
        }
        .hot-group__card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .hot-group__card:hover .hot-group__card-img img {
            transform: scale(1.05);
        }
        .hot-group__card-body {
            padding: 16px;
        }
        .hot-group__card-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-heading);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .hot-group__card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--color-muted);
        }
        .hot-group__progress {
            margin-top: 10px;
            height: 6px;
            background: #eee;
            border-radius: 3px;
            overflow: hidden;
        }
        .hot-group__progress-bar {
            height: 100%;
            background: var(--color-secondary);
            border-radius: 3px;
            transition: width var(--transition-slow);
        }
        .hot-group__progress-bar--hot {
            background: var(--color-accent);
        }
        .hot-group__tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 8px;
            border-radius: 10px;
            background: rgba(212, 175, 55, 0.15);
            color: #8B6914;
        }
        .hot-group__tag--urgent {
            background: rgba(107, 29, 47, 0.1);
            color: var(--color-secondary);
        }

        @media (max-width: 1024px) {
            .hot-group__grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .hot-group__grid {
                grid-template-columns: 1fr;
            }
            .hot-group__card-img {
                height: 200px;
            }
        }

        /* ========== 卖点三连 ========== */
        .selling-points {
            background: var(--color-white);
        }
        .selling-points__grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .selling-points__card {
            text-align: center;
            padding: 40px 28px;
            border-radius: var(--radius-lg);
            transition: all var(--transition);
            border: 1px solid transparent;
            position: relative;
        }
        .selling-points__card:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .selling-points__card--highlight {
            background: linear-gradient(180deg, #fdf8f0 0%, #fff 100%);
            border-color: rgba(212, 175, 55, 0.3);
        }
        .selling-points__card-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(107, 29, 47, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 28px;
            color: var(--color-secondary);
        }
        .selling-points__card--highlight .selling-points__card-icon {
            background: rgba(212, 175, 55, 0.15);
            color: #8B6914;
        }
        .selling-points__card-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-heading);
            margin-bottom: 10px;
        }
        .selling-points__card-desc {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .selling-points__grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .selling-points__card {
                padding: 28px 20px;
            }
        }

        /* ========== 任务进度板块 ========== */
        .task-progress {
            background: var(--color-primary);
            color: #fff;
        }
        .task-progress__inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .task-progress__steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .task-progress__step {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 20px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius);
            border-left: 3px solid transparent;
            transition: all var(--transition);
        }
        .task-progress__step--done {
            border-left-color: var(--color-accent);
            background: rgba(212, 175, 55, 0.06);
        }
        .task-progress__step--active {
            border-left-color: var(--color-secondary);
            background: rgba(107, 29, 47, 0.15);
        }
        .task-progress__step-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            flex-shrink: 0;
        }
        .task-progress__step--done .task-progress__step-num {
            background: var(--color-accent);
            color: var(--color-primary);
        }
        .task-progress__step--active .task-progress__step-num {
            background: var(--color-secondary);
            color: #fff;
        }
        .task-progress__step-title {
            font-weight: 600;
            font-size: 15px;
            margin-bottom: 4px;
        }
        .task-progress__step-desc {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }
        .task-progress__reward {
            background: rgba(212, 175, 55, 0.1);
            border: 1px solid rgba(212, 175, 55, 0.3);
            border-radius: var(--radius-lg);
            padding: 32px;
            text-align: center;
        }
        .task-progress__reward-icon {
            font-size: 48px;
            color: var(--color-accent);
            margin-bottom: 16px;
        }
        .task-progress__reward-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .task-progress__reward-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
        }
        .task-progress__overall-bar {
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 4px;
            overflow: hidden;
            margin-top: 16px;
        }
        .task-progress__overall-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
            border-radius: 4px;
            width: 60%;
            transition: width var(--transition-slow);
        }

        @media (max-width: 768px) {
            .task-progress__inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ========== 资讯板块 ========== */
        .news-feed {
            background: var(--color-bg);
        }
        .news-feed__layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 36px;
        }
        .news-feed__list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .news-feed__item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            border-bottom: 1px solid var(--color-border);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .news-feed__item:hover {
            padding-left: 8px;
            color: var(--color-secondary);
        }
        .news-feed__item-title {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-heading);
            flex: 1;
            line-height: 1.5;
        }
        .news-feed__item:hover .news-feed__item-title {
            color: var(--color-secondary);
        }
        .news-feed__item-meta {
            font-size: 12px;
            color: var(--color-muted);
            white-space: nowrap;
            margin-left: 16px;
        }
        .news-feed__item-tag {
            display: inline-block;
            font-size: 11px;
            padding: 2px 8px;
            border-radius: 10px;
            background: rgba(107, 29, 47, 0.08);
            color: var(--color-secondary);
            margin-right: 8px;
            font-weight: 500;
        }
        .news-feed__sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .news-feed__sidebar-card {
            background: var(--color-white);
            border-radius: var(--radius);
            padding: 20px;
            border: 1px solid var(--color-border);
        }
        .news-feed__sidebar-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-heading);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--color-border);
        }
        .news-feed__tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .news-feed__tag {
            font-size: 12px;
            padding: 6px 12px;
            border-radius: 16px;
            background: var(--color-light-gray);
            color: var(--color-text);
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .news-feed__tag:hover {
            background: var(--color-secondary);
            color: #fff;
        }
        .news-feed__hot-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            border-bottom: 1px solid #f5f5f5;
            font-size: 13px;
            cursor: pointer;
            transition: color var(--transition-fast);
        }
        .news-feed__hot-item:hover {
            color: var(--color-secondary);
        }
        .news-feed__hot-rank {
            width: 22px;
            height: 22px;
            border-radius: 4px;
            background: var(--color-secondary);
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .news-feed__hot-rank--top {
            background: var(--color-accent);
            color: var(--color-primary);
        }

        @media (max-width: 768px) {
            .news-feed__layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .news-feed__sidebar {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 16px;
            }
            .news-feed__sidebar-card {
                flex: 1;
                min-width: 200px;
            }
        }
        @media (max-width: 480px) {
            .news-feed__sidebar {
                flex-direction: column;
            }
            .news-feed__item {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .news-feed__item-meta {
                margin-left: 0;
            }
        }

        /* ========== 渠道卖点板块 ========== */
        .channel-usp {
            background: var(--color-white);
        }
        .channel-usp__layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: start;
        }
        .channel-usp__steps {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .channel-usp__step {
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .channel-usp__step-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(107, 29, 47, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-secondary);
            flex-shrink: 0;
        }
        .channel-usp__step-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-heading);
            margin-bottom: 4px;
        }
        .channel-usp__step-content p {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.6;
        }
        .channel-usp__faq {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .channel-usp__faq-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .channel-usp__faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-heading);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-align: left;
            transition: background var(--transition-fast);
        }
        .channel-usp__faq-question:hover {
            background: var(--color-light-gray);
        }
        .channel-usp__faq-question i {
            transition: transform var(--transition);
            font-size: 13px;
            color: var(--color-muted);
        }
        .channel-usp__faq-item.open .channel-usp__faq-question i {
            transform: rotate(180deg);
            color: var(--color-secondary);
        }
        .channel-usp__faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 20px;
            font-size: 14px;
            color: #555;
            line-height: 1.7;
        }
        .channel-usp__faq-item.open .channel-usp__faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        @media (max-width: 768px) {
            .channel-usp__layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ========== 开团入口 CTA ========== */
        .cta-banner {
            background: url('/assets/images/backpic/back-2.jpg') center / cover no-repeat;
            position: relative;
            padding: 80px 0;
            text-align: center;
        }
        .cta-banner__overlay {
            position: absolute;
            inset: 0;
            background: rgba(10, 12, 14, 0.7);
            z-index: 1;
        }
        .cta-banner__content {
            position: relative;
            z-index: 2;
            max-width: 650px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .cta-banner__title {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .cta-banner__desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .cta-banner__btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .cta-banner {
                padding: 56px 0;
            }
            .cta-banner__title {
                font-size: 26px;
            }
        }
        @media (max-width: 480px) {
            .cta-banner__title {
                font-size: 22px;
            }
            .cta-banner__btns {
                flex-direction: column;
                align-items: center;
            }
        }

        /* ========== 页脚 ========== */
        .footer {
            background: var(--color-primary);
            color: #999;
            padding: 56px 0 0;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer__col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #ccc;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer__col p {
            font-size: 13px;
            line-height: 1.8;
            color: #888;
        }
        .footer__col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer__col ul li a {
            font-size: 13px;
            color: #888;
            transition: color var(--transition-fast);
        }
        .footer__col ul li a:hover {
            color: var(--color-accent);
        }
        .footer__social {
            display: flex;
            gap: 14px;
            margin-top: 8px;
        }
        .footer__social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #999;
            transition: all var(--transition-fast);
        }
        .footer__social a:hover {
            background: var(--color-secondary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer__bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: #666;
        }
        .footer__bottom strong {
            color: #999;
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 480px) {
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ========== 移动端导航遮罩 ========== */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            transition: opacity var(--transition);
        }
        .nav-overlay.active {
            display: block;
        }

        /* ========== 动画 ========== */
        .fade-in-up {
            animation: fadeInUp 0.6s ease forwards;
            opacity: 0;
        }
        .fade-in-up:nth-child(1) {
            animation-delay: 0.1s;
        }
        .fade-in-up:nth-child(2) {
            animation-delay: 0.2s;
        }
        .fade-in-up:nth-child(3) {
            animation-delay: 0.3s;
        }
        .fade-in-up:nth-child(4) {
            animation-delay: 0.4s;
        }

        /* ========== 焦点可见 ========== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* ========== 选择文本 ========== */
        ::selection {
            background: rgba(107, 29, 47, 0.2);
            color: var(--color-heading);
        }