/* ==========================================================================
   每日大赛yandex 设计系统 v1.0
   "竞技场活力" — Warm Editorial × Neo-Brutalist Competition Aesthetic
   Palette: 奶油白 / 珊瑚橙 / 胜利青 / 金
   ========================================================================== */

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

:root {
    --cream: #FBF7F0;
    --cream-deep: #F3EBDE;
    --coral: #FF5A36;
    --coral-dark: #E84A2A;
    --coral-soft: #FFE3DC;
    --teal: #0E7C7B;
    --teal-bright: #17A09E;
    --teal-soft: #DDF2F0;
    --yellow: #FFC53D;
    --ink: #1C1712;
    --ink-muted: #6E655C;
    --ink-light: #A89F96;
    --white: #FFFFFF;
    --border: 2px solid var(--ink);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-hard: 6px 6px 0 var(--ink);
    --shadow-hard-lg: 10px 10px 0 var(--ink);
    --shadow-soft: 0 8px 32px rgba(43, 32, 20, 0.10);
    --font-display: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
    background: var(--cream);
    color: var(--ink);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 全局装饰：极细网格线 + 点阵 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image:
        linear-gradient(to right, rgba(14, 124, 123, 0.05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(14, 124, 123, 0.05) 1px, transparent 1px);
    background-size: 72px 72px;
    pointer-events: none;
    z-index: 0;
}

body::after {
    content: 'meiridasail.net.cn';
    position: fixed;
    bottom: -40px;
    right: -40px;
    font-size: 10rem;
    font-weight: 900;
    letter-spacing: -0.04em;
    color: transparent;
    -webkit-text-stroke: 1px rgba(255, 90, 54, 0.10);
    z-index: 0;
    line-height: 0.8;
    transform: rotate(-8deg);
    pointer-events: none;
}

::selection {
    background: var(--coral);
    color: #fff;
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--cream-deep);
}

::-webkit-scrollbar-thumb {
    background: var(--teal);
    border-radius: 20px;
    border: 2px solid var(--cream-deep);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--coral);
}

/* ==========================================================================
   核心布局
   ========================================================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.section {
    padding: 100px 0;
    position: relative;
}

.section:nth-child(even) {
    background: var(--cream-deep);
}

.section:nth-child(odd) {
    background: var(--cream);
}

.section::before {
    content: '';
    position: absolute;
    width: 40px;
    height: 5px;
    background: var(--coral);
    border-radius: 4px;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    display: none;
}

/* ==========================================================================
   导航
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(251, 247, 240, 0.94);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    border-bottom: var(--border);
    box-shadow: 0 2px 24px rgba(28, 23, 18, 0.06);
    transition: box-shadow 0.3s ease;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
    font-size: 1.3rem;
    text-decoration: none;
    color: var(--ink);
    letter-spacing: -1px;
    line-height: 1.2;
    white-space: nowrap;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    background: var(--coral);
    color: #fff;
    border: var(--border);
    box-shadow: 3px 3px 0 var(--ink);
    transform: rotate(-3deg) scale(1);
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    flex-shrink: 0;
}

.logo:hover .logo-icon {
    transform: rotate(3deg) scale(1.08);
    box-shadow: 5px 5px 0 var(--ink);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 2px;
    list-style: none;
}

.main-nav li {
    margin: 0;
    padding: 0;
}

.main-nav a {
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--ink);
    padding: 9px 14px;
    border-radius: 10px;
    transition: all 0.22s ease;
    position: relative;
    display: inline-block;
}

.main-nav a:not(.nav-cta)::before {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 14px;
    width: 0;
    height: 3px;
    background: var(--coral);
    border-radius: 3px;
    transition: width 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.main-nav a:not(.nav-cta):hover {
    color: var(--coral-dark);
    transform: translateY(-1px);
}

.main-nav a:not(.nav-cta):hover::before {
    width: calc(100% - 28px);
}

.nav-cta {
    padding: 9px 22px !important;
    border-radius: 12px !important;
    color: #fff !important;
    font-weight: 700 !important;
    background: var(--teal);
    border: var(--border);
    box-shadow: 3px 3px 0 var(--ink);
    transition: all 0.22s ease !important;
    letter-spacing: 0.3px;
}

.nav-cta:hover {
    transform: translate(-2px, -2px) !important;
    box-shadow: 5px 5px 0 var(--ink);
    background: var(--teal-bright) !important;
    color: #fff !important;
}

.nav-cta::before {
    display: none !important;
}

.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--coral);
    border: var(--border);
    color: #fff;
    font-size: 1.1rem;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: 3px 3px 0 var(--ink);
    transition: all 0.2s ease;
    z-index: 1001;
}

.menu-toggle:hover {
    transform: translate(-1px, -1px);
    box-shadow: 5px 5px 0 var(--ink);
}

.menu-toggle.open {
    background: var(--teal);
    transform: rotate(90deg);
}

/* ==========================================================================
   Hero 英雄区
   ========================================================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    padding: 120px 24px 80px;
    position: relative;
    overflow: hidden;
    background: var(--cream);
}

/* 大号装饰圆环 */
.hero::before {
    content: '';
    position: absolute;
    width: 560px;
    height: 560px;
    border: 4px dashed rgba(255, 90, 54, 0.18);
    border-radius: 50%;
    right: -160px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 0;
    animation: heroSpin 36s linear infinite;
}

.hero::after {
    content: '每日大赛';
    position: absolute;
    left: -30px;
    bottom: -60px;
    font-size: 22vw;
    font-weight: 900;
    color: rgba(224, 196, 168, 0.22);
    line-height: 0.8;
    letter-spacing: -0.05em;
    z-index: 0;
    pointer-events: none;
    white-space: nowrap;
}

@keyframes heroSpin {
    from { transform: translateY(-50%) rotate(0deg); }
    to   { transform: translateY(-50%) rotate(360deg); }
}

.hero-content {
    max-width: 680px;
    position: relative;
    z-index: 2;
    flex: 1;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 2.5px;
    padding: 8px 20px;
    border-radius: 100px;
    margin-bottom: 24px;
    background: var(--yellow);
    color: var(--ink);
    border: var(--border);
    box-shadow: 3px 3px 0 var(--ink);
    text-transform: uppercase;
    position: relative;
}

.hero-eyebrow::after {
    content: '●';
    display: inline-block;
    color: var(--coral);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
}

.hero h1 {
    font-family: var(--font-display);
    font-size: 4.2rem;
    line-height: 1.12;
    margin-bottom: 26px;
    font-weight: 900;
    letter-spacing: -3px;
    color: var(--ink);
    text-shadow: 3px 3px 0 rgba(255, 197, 61, 0.35);
}

.hero h1 .accent {
    color: var(--coral);
    position: relative;
    display: inline-block;
}

.hero h1 .accent::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 4px;
    right: 4px;
    height: 12px;
    background: rgba(255, 197, 61, 0.5);
    z-index: -1;
    border-radius: 4px;
    transform: rotate(-1deg);
}

.hero h1 .accent-teal {
    color: var(--teal);
    position: relative;
}

.hero h1 .accent-teal::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 4px;
    right: 4px;
    height: 12px;
    background: rgba(14, 124, 123, 0.18);
    z-index: -1;
    border-radius: 4px;
    transform: rotate(1deg);
}

.hero p {
    font-size: 1.12rem;
    opacity: 0.75;
    max-width: 560px;
    margin-bottom: 36px;
    line-height: 1.8;
    color: var(--ink);
}

.hero-buttons {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.hero-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    border: var(--border);
    box-shadow: var(--shadow-hard-lg);
    flex: 0 0 440px;
    max-width: 440px;
    aspect-ratio: 4/5;
    background: linear-gradient(145deg, var(--teal-soft), var(--coral-soft));
    z-index: 1;
    transform: rotate(2deg);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.hero-image:hover {
    transform: rotate(0deg) scale(1.01);
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    opacity: 0.85;
}

/* 金币角标 */
.hero-image::before {
    content: '🏆 每日竞赛';
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--yellow);
    color: var(--ink);
    padding: 7px 16px;
    border-radius: 100px;
    font-weight: 800;
    font-size: 0.78rem;
    border: var(--border);
    box-shadow: 2px 2px 0 var(--ink);
    z-index: 2;
}

.hero-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(28, 23, 18, 0.06), transparent 40%);
    z-index: 1;
}

/* 滚动指示器 */
.hero-scroll-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: var(--ink-muted);
    font-size: 0.8rem;
    z-index: 2;
    text-decoration: none;
}

.hero-scroll-hint::before {
    content: '↓';
    font-size: 1.4rem;
    color: var(--coral);
    animation: bounceY 2s ease-in-out infinite;
}

@keyframes bounceY {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}

/* ==========================================================================
   按钮
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 30px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    border: var(--border);
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    line-height: 1.4;
    white-space: nowrap;
}

.btn-primary {
    color: #fff;
    background: var(--coral);
    box-shadow: 4px 4px 0 var(--ink);
}

.btn-primary:hover {
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0 var(--ink);
    background: var(--coral-dark);
    color: #fff;
}

.btn-primary:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--ink);
}

.btn-outline {
    background: var(--white);
    border: var(--border);
    color: var(--ink);
    box-shadow: 4px 4px 0 var(--teal);
}

.btn-outline:hover {
    background: var(--teal-soft);
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0 var(--teal);
    color: var(--ink);
}

.btn-outline:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--teal);
}

/* ==========================================================================
   标签 / 标题
   ========================================================================== */

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 3px;
    margin-bottom: 16px;
    color: var(--teal);
    text-transform: uppercase;
    position: relative;
}

.section-label::before {
    content: '';
    display: inline-block;
    width: 28px;
    height: 3px;
    background: var(--coral);
    border-radius: 4px;
}

.section-label::after {
    content: '/';
    font-weight: 400;
    color: var(--coral);
    margin-left: 2px;
}

.section-title {
    font-size: 2.7rem;
    margin-bottom: 18px;
    font-weight: 900;
    letter-spacing: -2px;
    line-height: 1.15;
    color: var(--ink);
    position: relative;
}

.section-desc {
    max-width: 600px;
    opacity: 0.7;
    margin-bottom: 52px;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--ink);
}

/* ==========================================================================
   卡片网格 — 竞技场
   ========================================================================== */

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 28px;
    position: relative;
    z-index: 1;
}

.category-card {
    border-radius: var(--radius-lg);
    padding: 30px 26px;
    border: var(--border);
    background: var(--white);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

/* 票根风格底部 */
.category-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 8px;
    background: repeating-linear-gradient(
        -45deg,
        var(--teal) 0,
        var(--teal) 8px,
        transparent 8px,
        transparent 16px
    );
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.category-card:nth-child(2n)::after {
    background: repeating-linear-gradient(
        -45deg,
        var(--coral) 0,
        var(--coral) 8px,
        transparent 8px,
        transparent 16px
    );
}

.category-card:nth-child(3n)::after {
    background: repeating-linear-gradient(
        -45deg,
        var(--yellow) 0,
        var(--yellow) 8px,
        transparent 8px,
        transparent 16px
    );
}

.category-card:hover {
    transform: translate(-4px, -4px);
    box-shadow: 9px 9px 0 var(--ink);
}

.category-card:hover::after {
    opacity: 1;
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 1.5rem;
    background: var(--teal-soft);
    border: var(--border);
    box-shadow: 3px 3px 0 rgba(28, 23, 18, 0.15);
    transition: all 0.3s ease;
}

.category-card:hover .card-icon {
    transform: rotate(-8deg) scale(1.1);
    box-shadow: 4px 4px 0 var(--ink);
}

.category-card:nth-child(2n) .card-icon {
    background: var(--coral-soft);
}

.category-card:nth-child(3n) .card-icon {
    background: #FFF3CF;
}

.category-card h3 {
    font-size: 1.18rem;
    font-weight: 800;
    margin-bottom: 10px;
    letter-spacing: -0.3px;
}

.category-card P {
    font-size: 0.92rem;
    opacity: 0.65;
    line-height: 1.6;
    margin-bottom: 14px;
}

.card-link {
    font-weight: 700;
    font-size: 0.88rem;
    text-decoration: none;
    color: var(--coral);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    position: relative;
    transition: all 0.2s ease;
    padding-bottom: 2px;
    border-bottom: 2px solid transparent;
}

.card-link:hover {
    border-bottom-color: var(--coral);
    gap: 10px;
}

/* ==========================================================================
   特性块
   ========================================================================== */

.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 68px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.feature-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: var(--border);
    box-shadow: var(--shadow-hard-lg);
    position: relative;
    transform: rotate(-1.5deg);
    transition: transform 0.4s ease;
    background: linear-gradient(135deg, var(--coral-soft), var(--teal-soft));
}

.feature-image:nth-child(2n) {
    transform: rotate(1.5deg);
}

.feature-image:hover {
    transform: rotate(0deg) scale(1.01);
}

.feature-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 90, 54, 0.12), rgba(14, 124, 123, 0.12));
    z-index: 1;
}

.feature-image img {
    width: 100%;
    height: 100%;
    min-height: 340px;
    object-fit: cover;
    display: block;
    opacity: 0.9;
}

.feature-text {
    position: relative;
    z-index: 1;
}

.feature-text::before {
    content: '✦';
    position: absolute;
    top: -30px;
    right: -10px;
    font-size: 3.2rem;
    color: var(--yellow);
    opacity: 0.5;
    animation: heroSpin 20s linear infinite;
}

.feature-text h2 {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 18px;
    letter-spacing: -1px;
    line-height: 1.2;
}

.feature-text > p {
    opacity: 0.7;
    line-height: 1.75;
    margin-bottom: 24px;
    font-size: 1rem;
}

.feature-list {
    list-style: none;
    margin-top: 10px;
}

.feature-list li {
    padding: 9px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    font-size: 0.96rem;
}

.feature-list li::before {
    content: '✓';
    font-weight: 900;
    color: var(--teal);
    background: var(--teal-soft);
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    border: 1.5px solid var(--teal);
    flex-shrink: 0;
}

/* ==========================================================================
   数据条
   ========================================================================== */

.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.stat-item {
    padding: 34px 20px 30px;
    border-radius: var(--radius-lg);
    border: var(--border);
    background: var(--white);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--coral);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s ease;
}

.stat-item::after {
    content: '';
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 12px;
    height: 12px;
    border-radius: 3px;
    background: var(--yellow);
    border: var(--border);
    opacity: 0.4;
}

.stat-item:nth-child(2n)::before {
    background: var(--teal);
}

.stat-item:nth-child(3n)::before {
    background: var(--yellow);
}

.stat-item:hover {
    transform: translate(-3px, -3px);
    box-shadow: 7px 7px 0 var(--ink);
}

.stat-item:hover::before {
    transform: scaleX(1);
}

.stat-number {
    font-size: 2.9rem;
    font-weight: 900;
    color: var(--coral);
    line-height: 1;
    letter-spacing: -2px;
    font-feature-settings: 'tnum';
}

.stat-item:nth-child(2n) .stat-number {
    color: var(--teal);
}

.stat-item:nth-child(3n) .stat-number {
    color: #C28700;
}

.stat-number::after {
    content: '+';
    font-size: 1.4rem;
    vertical-align: top;
    margin-left: 2px;
    font-weight: 800;
}

.stat-label {
    font-size: 0.88rem;
    opacity: 0.58;
    margin-top: 10px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   内容墙
   ========================================================================== */

.content-wall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
    position: relative;
    z-index: 1;
}

.content-wall-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: var(--border);
    background: var(--white);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

.content-wall-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--coral);
    z-index: 2;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.content-wall-item:nth-child(2n)::before,
.content-wall-item:nth-child(3n)::before {
    background: var(--teal);
}

.content-wall-item:nth-child(3n)::before {
    background: var(--yellow);
}

.content-wall-item:hover {
    transform: translate(-3px, -3px);
    box-shadow: 8px 8px 0 var(--ink);
}

.content-wall-item:hover::before {
    transform: scaleX(1);
}

.content-wall-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    border-bottom: var(--border);
    transition: transform 0.4s ease;
}

.content-wall-item:hover img {
    transform: scale(1.03);
}

.content-wall-body {
    padding: 20px 24px 24px;
}

.content-wall-body h3 {
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 8px;
    line-height: 1.4;
    letter-spacing: -0.3px;
}

.content-wall-body p {
    font-size: 0.9rem;
    opacity: 0.62;
    line-height: 1.65;
}

.content-wall-body .tag {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--coral);
    background: var(--coral-soft);
    padding: 3px 12px;
    border-radius: 100px;
    margin-bottom: 10px;
    border: 1px solid rgba(255, 90, 54, 0.3);
}

.content-wall-item:nth-child(2n) .tag {
    color: var(--teal);
    background: var(--teal-soft);
    border-color: rgba(14, 124, 123, 0.3);
}

/* ==========================================================================
   FAQ
   ========================================================================== */

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.faq-item {
    border: var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    cursor: pointer;
    background: var(--white);
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 4px 4px 0 var(--teal);
    transform: translate(-1px, -1px);
}

.faq-item .faq-question {
    padding: 20px 24px;
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.05rem;
    gap: 16px;
    line-height: 1.5;
}

.faq-item .faq-question::after {
    content: '＋';
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--coral);
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--coral-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px solid var(--coral);
}

.faq-item .faq-answer {
    padding: 0 24px 22px;
    display: none;
    opacity: 0.72;
    line-height: 1.75;
    font-size: 0.96rem;
}

.faq-item.open {
    background: var(--teal-soft);
    box-shadow: 4px 4px 0 var(--teal);
}

.faq-item.open .faq-question {
    color: var(--teal);
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
    background: var(--teal);
    color: #fff;
    border-color: var(--teal);
}

.faq-item.open .faq-answer {
    display: block;
    animation: fadeSlideIn 0.35s ease;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   CTA 横幅
   ========================================================================== */

.cta-banner {
    padding: 64px 56px;
    text-align: center;
    border-radius: var(--radius-lg);
    color: #fff;
    background: var(--teal);
    border: var(--border);
    box-shadow: 10px 10px 0 var(--coral);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

/* 装饰点阵背景 */
.cta-banner::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 197, 61, 0.35), transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

.cta-banner::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -80px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    border: 20px solid rgba(255, 255, 255, 0.08);
    animation: heroSpin 24s linear infinite;
}

.cta-banner h2 {
    color: #fff;
    font-size: 2.1rem;
    font-weight: 900;
    margin-bottom: 18px;
    letter-spacing: -1px;
    line-height: 1.2;
    position: relative;
    z-index: 2;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
    font-size: 1.05rem;
    line-height: 1.7;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 2;
}

.cta-banner .btn-primary {
    background: var(--yellow);
    color: var(--ink);
    position: relative;
    z-index: 2;
    border-color: var(--ink);
    box-shadow: 4px 4px 0 var(--ink);
}

.cta-banner .btn-primary:hover {
    box-shadow: 7px 7px 0 var(--ink);
    transform: translate(-2px, -2px);
    background: #FFD468;
}

/* ==========================================================================
   页脚
   ========================================================================== */

.site-footer {
    padding: 80px 0 32px;
    background: var(--cream-deep);
    border-top: var(--border);
    position: relative;
    z-index: 1;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: repeating-linear-gradient(
        90deg,
        var(--coral) 0,
        var(--coral) 2px,
        transparent 2px,
        transparent 20px,
        var(--teal) 20px,
        var(--teal) 22px,
        transparent 22px,
        transparent 40px,
        var(--yellow) 40px,
        var(--yellow) 42px,
        transparent 42px,
        transparent 56px
    );
}

.site-footer .container {
    position: relative;
    z-index: 1;
}

.site-footer::after {
    content: '每日大赛';
    position: absolute;
    bottom: -30px;
    right: 20px;
    font-size: 8rem;
    font-weight: 900;
    letter-spacing: -0.04em;
    color: transparent;
    -webkit-text-stroke: 1px rgba(14, 124, 123, 0.10);
    pointer-events: none;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-brand .logo {
    color: var(--ink);
}

.footer-brand .logo-icon {
    background: var(--coral);
    color: #fff;
    box-shadow: 3px 3px 0 var(--ink);
}

.footer-brand p {
    font-size: 0.92rem;
    line-height: 1.75;
    color: var(--ink-muted);
    max-width: 280px;
}

.footer-brand .footer-cert {
    display: flex;
    gap: 10px;
    margin-top: 6px;
}

.footer-brand .footer-cert span {
    font-size: 0.75rem;
    padding: 4px 14px;
    border-radius: 100px;
    border: 1.5px solid var(--ink);
    background: var(--white);
    font-weight: 600;
    color: var(--ink-muted);
}

.footer-col h4 {
    color: var(--ink);
    font-size: 1rem;
    font-weight: 800;
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 28px;
    height: 4px;
    background: var(--coral);
    border-radius: 3px;
}

.footer-col a {
    display: block;
    text-decoration: none;
    color: var(--ink-muted);
    padding: 5px 0;
    font-size: 0.9rem;
    transition: all 0.22s ease;
}

.footer-col a:hover {
    color: var(--coral);
    transform: translateX(5px);
}

.footer-bottom {
    border-top: 1.5px solid rgba(28, 23, 18, 0.12);
    margin-top: 56px;
    padding-top: 24px;
    text-align: center;
    font-size: 0.84rem;
    color: var(--ink-light);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

.footer-bottom a {
    color: var(--teal);
    text-decoration: none;
    font-weight: 600;
}

.footer-bottom a:hover {
    color: var(--coral);
}

/* ==========================================================================
   工具类
   ========================================================================== */

.text-accent {
    color: var(--coral);
    font-weight: 800;
}

.text-center {
    text-align: center;
}

.text-center .section-desc {
    margin-left: auto;
    margin-right: auto;
}

.seo-description {
    max-width: 600px;
    margin: 0 auto 56px;
    opacity: 0.7;
    line-height: 1.8;
    text-align: center;
    font-size: 1rem;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ==========================================================================
   额外装饰组件 — 跑马灯
   ========================================================================== */

.marquee {
    background: var(--coral);
    border-top: var(--border);
    border-bottom: var(--border);
    padding: 14px 0;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.marquee-inner {
    display: flex;
    gap: 48px;
    white-space: nowrap;
    animation: marqueeScroll 28s linear infinite;
    width: max-content;
}

.marquee-inner span {
    font-size: 1rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 48px;
}

.marquee-inner span::after {
    content: '✦';
    color: var(--yellow);
}

@keyframes marqueeScroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

.marquee-teal {
    background: var(--teal);
}

/* ==========================================================================
   装饰圆点
   ========================================================================== */

.deco-dots {
    position: absolute;
    width: 80px;
    height: 80px;
    background-image: radial-gradient(circle, var(--coral) 6px, transparent 7px);
    background-size: 20px 20px;
    z-index: 0;
    pointer-events: none;
    opacity: 0.25;
}

.deco-circle {
    position: absolute;
    width: 140px;
    height: 140px;
    border: 3px dashed rgba(14, 124, 123, 0.25);
    border-radius: 50%;
    z-index: 0;
    pointer-events: none;
    animation: heroSpin 28s linear infinite;
}

/* ==========================================================================
   响应式
   ========================================================================== */

@media (max-width: 900px) {
    .hero {
        flex-direction: column;
        gap: 40px;
        padding: 120px 24px 60px;
        text-align: center;
    }

    .hero p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-image {
        flex: 0 0 100%;
        max-width: 420px;
        margin: 0 auto;
        aspect-ratio: 4/3;
    }

    .feature-block {
        grid-template-columns: 1fr;
        gap: 44px;
    }

    .feature-image {
        max-width: 520px;
        margin: 0 auto;
        width: 100%;
    }

    .section-title {
        font-size: 2.2rem;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 72px 0;
    }

    .header-inner {
        height: 64px;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: var(--cream);
        border-bottom: var(--border);
        padding: 20px 24px;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        max-height: calc(100vh - 64px);
        overflow-y: auto;
        z-index: 1000;
    }

    .main-nav.open {
        display: flex;
        animation: navDrop 0.3s ease;
    }

    @keyframes navDrop {
        from {
            opacity: 0;
            transform: translateY(-12px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .main-nav a:not(.nav-cta)::before {
        display: none;
    }

    .main-nav a {
        padding: 13px 16px;
        font-size: 1rem;
        display: block;
        width: 100%;
        border-radius: var(--radius-sm);
    }

    .main-nav a:not(.nav-cta):hover {
        background: var(--cream-deep);
    }

    .nav-cta {
        margin-top: 12px;
        text-align: center;
        display: block;
    }

    .menu-toggle {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding-top: 100px;
    }

    .hero h1 {
        font-size: 2.3rem;
        letter-spacing: -1.5px;
    }

    .hero p {
        font-size: 1rem;
    }

    .hero-image {
        border-radius: var(--radius-md);
    }

    .feature-block {
        grid-template-columns: 1fr;
    }

    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .cta-banner {
        padding: 44px 24px;
    }

    .cta-banner h2 {
        font-size: 1.7rem;
    }

    .section-title {
        font-size: 1.9rem;
    }

    .cards-grid,
    .content-wall {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .cards-grid,
    .content-wall,
    .stats-bar {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-eyebrow {
        font-size: 0.75rem;
        padding: 6px 14px;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .stat-item {
        padding: 24px 16px 20px;
    }

    .stat-number {
        font-size: 2.2rem;
    }

    .hero-image {
        max-width: 100%;
    }

    .cta-banner {
        padding: 36px 20px;
        border-radius: var(--radius-md);
    }

    .cta-banner h2 {
        font-size: 1.4rem;
    }

    .cta-banner p {
        font-size: 0.95rem;
        margin-bottom: 22px;
    }

    .feature-image img {
        min-height: 220px;
    }

    .faq-item .faq-question {
        padding: 16px 16px;
        font-size: 0.95rem;
    }

    .faq-item .faq-question::after {
        width: 28px;
        height: 28px;
        font-size: 1.1rem;
    }

    .faq-item .faq-answer {
        padding: 0 16px 18px;
        font-size: 0.9rem;
    }

    .logo {
        font-size: 1.05rem;
    }

    .logo-icon {
        width: 34px;
        height: 34px;
        font-size: 1rem;
    }
}