/* ============================================
   乐优助手 - 官方网站样式表
   ============================================ */

/* ========== CSS 变量 & 重置 ========== */
:root {
    --primary: #1a0b2e;
    --primary-light: #2d1b4e;
    --accent: #e63946;
    --accent-hover: #c1121f;
    --purple: #8b5cf6;
    --purple-light: #a78bfa;
    --pink: #ec4899;
    --gold: #d4a853;
    --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #ec4899 50%, #e63946 100%);
    --gradient-accent: linear-gradient(135deg, #e63946 0%, #ff6b6b 100%);
    --gradient-purple: linear-gradient(135deg, #6d28d9 0%, #a78bfa 100%);
    --text: #1f2937;
    --text-light: #4b5563;
    --text-muted: #9ca3af;
    --bg: #ffffff;
    --bg-light: #faf9fc;
    --bg-dark: #0d0420;
    --border: #ececf5;
    --shadow-sm: 0 2px 8px rgba(76, 29, 149, 0.06);
    --shadow: 0 4px 24px rgba(76, 29, 149, 0.08);
    --shadow-lg: 0 12px 48px rgba(76, 29, 149, 0.15);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.25);
    --radius: 10px;
    --radius-lg: 20px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
    --header-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

ul,
ol {
    list-style: none;
}

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

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

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: var(--radius);
    cursor: pointer;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 13px;
    border-radius: 6px;
}

.btn-primary {
    background: var(--gradient-accent);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.6s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(230, 57, 70, 0.35);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
}

.btn-outline:hover {
    background: var(--accent);
    color: #fff;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-hero-primary {
    background: var(--gradient-primary);
    background-size: 200% 200%;
    color: #fff;
    font-size: 17px;
    padding: 16px 40px;
    border-radius: 50px;
    font-weight: 700;
    box-shadow: 0 8px 32px rgba(139, 92, 246, 0.45);
    letter-spacing: 0.04em;
    position: relative;
    overflow: hidden;
    animation: gradientShift 6s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.btn-hero-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50px;
    background: radial-gradient(circle at center, rgba(255,255,255,0.4) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s;
}

.btn-hero-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 14px 40px rgba(236, 72, 153, 0.55);
}

.btn-hero-primary:hover::after {
    opacity: 1;
}

.btn-hero-outline {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 17px;
    padding: 16px 36px;
    border-radius: 50px;
    font-weight: 600;
    border: 2px solid rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(6px);
}

.btn-hero-outline:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: #fff;
    transform: translateY(-3px);
}

.btn-copy {
    background: var(--gradient-purple);
    color: #fff;
    font-size: 13px;
    padding: 9px 20px;
    border-radius: 8px;
    cursor: pointer;
    border: none;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.btn-copy:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(139, 92, 246, 0.4);
}

.btn-copy.copied {
    background: #27ae60;
}

/* ========== 页头导航 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 4, 32, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(139, 92, 246, 0.15);
    transition: var(--transition);
    height: var(--header-height);
}

.header.scrolled {
    background: rgba(13, 4, 32, 0.92);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    border-bottom-color: rgba(139, 92, 246, 0.25);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.04em;
}

.logo-icon {
    font-size: 30px;
}

.logo-img {
    width: 38px;
    height: 38px;
    object-fit: contain;
    filter: drop-shadow(0 2px 6px rgba(64, 224, 208, 0.4));
    transition: var(--transition);
}

.logo:hover .logo-img {
    transform: rotate(-8deg) scale(1.05);
}

.logo-text {
    background: linear-gradient(135deg, #fff, #e0e0e0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    display: block;
    padding: 8px 18px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 15px;
    font-weight: 500;
    border-radius: 6px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: var(--transition);
}

/* ========== Hero 区域 ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: var(--header-height);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #1a0b2e 0%, #2d1b4e 25%, #3d2466 50%, #2a1854 75%, #1a0b2e 100%);
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(189, 82, 255, 0.18) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 105, 180, 0.12) 0%, transparent 40%),
        radial-gradient(ellipse at 50% 80%, rgba(75, 30, 130, 0.4) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 60%, rgba(230, 57, 70, 0.1) 0%, transparent 45%);
    z-index: 1;
}

/* 背景装饰足球运动员 - 已移除 */

.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 1;
    background-image:
        radial-gradient(1px 1px at 10% 15%, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(1px 1px at 20% 65%, rgba(255, 255, 255, 0.2), transparent),
        radial-gradient(2px 2px at 35% 25%, rgba(255, 255, 255, 0.15), transparent),
        radial-gradient(1px 1px at 50% 45%, rgba(255, 255, 255, 0.25), transparent),
        radial-gradient(2px 2px at 65% 70%, rgba(255, 255, 255, 0.2), transparent),
        radial-gradient(1px 1px at 80% 35%, rgba(255, 255, 255, 0.15), transparent),
        radial-gradient(2px 2px at 90% 55%, rgba(255, 255, 255, 0.1), transparent),
        radial-gradient(1px 1px at 15% 85%, rgba(255, 255, 255, 0.2), transparent),
        radial-gradient(1px 1px at 45% 10%, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(2px 2px at 75% 90%, rgba(255, 255, 255, 0.15), transparent);
    animation: particleFloat 20s linear infinite;
}

@keyframes particleFloat {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: 60px 24px;
}

.hero-logo-wrap {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
}

.hero-logo {
    width: 120px;
    height: 120px;
    object-fit: contain;
    filter: drop-shadow(0 8px 24px rgba(64, 224, 208, 0.45));
    animation: heroLogoFloat 4s ease-in-out infinite;
}

@keyframes heroLogoFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-12px) rotate(3deg);
    }
}

.hero-badge {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 28px;
}

.hero-badge span {
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.95);
    padding: 7px 18px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.15);
    transition: var(--transition);
}

.hero-badge span:hover {
    background: rgba(139, 92, 246, 0.2);
    border-color: rgba(167, 139, 250, 0.4);
    transform: translateY(-2px);
}

.hero-title {
    font-size: clamp(40px, 7vw, 64px);
    font-weight: 900;
    color: #fff;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: 0.04em;
    text-shadow: 0 4px 30px rgba(139, 92, 246, 0.4);
    background: linear-gradient(135deg, #fff 0%, #f0e6ff 50%, #fff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title-sub {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 14px;
    padding: 3px 10px;
    border-radius: 4px;
    vertical-align: middle;
    margin-right: 8px;
    position: relative;
    top: -8px;
}

.hero-title-desc {
    display: block;
    font-size: clamp(18px, 3vw, 26px);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.85);
    margin-top: 12px;
    letter-spacing: 0.1em;
    -webkit-text-fill-color: rgba(255, 255, 255, 0.85);
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.hero-text {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-btns {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-bottom: 50px;
}

.hero-scroll {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(10px);
    }
}

.scroll-indicator {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
    transition: var(--transition);
}

.scroll-indicator:hover {
    color: #fff;
}

/* ========== Section 通用 ========== */
.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    margin-bottom: 12px;
    position: relative;
    padding: 0 28px;
}

.section-label::before,
.section-label::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 20px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--purple));
}

.section-label::before {
    left: 0;
    transform: translateY(-50%);
}

.section-label::after {
    right: 0;
    background: linear-gradient(90deg, var(--purple), transparent);
    transform: translateY(-50%);
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 16px;
    letter-spacing: 0.04em;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
    margin: 12px auto 0;
}

.section-desc {
    font-size: 16px;
    color: var(--text-light);
    max-width: 500px;
    margin: 0 auto;
}

/* ========== 核心优势 Features ========== */
.features {
    padding: 100px 0;
    background: var(--bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 28px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s;
}

.feature-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(139, 92, 246, 0.2);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

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

.feature-icon {
    font-size: 52px;
    margin-bottom: 20px;
    display: inline-block;
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.feature-card:hover .feature-icon {
    transform: scale(1.15) rotate(-8deg);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.75;
    position: relative;
    z-index: 1;
}

/* ========== 赛事覆盖 Coverage ========== */
.coverage {
    padding: 100px 0;
    background:
        radial-gradient(ellipse at 20% 0%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(236, 72, 153, 0.05) 0%, transparent 50%),
        var(--bg-light);
    position: relative;
    overflow: hidden;
}

.coverage::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.3), transparent);
}

.coverage-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.coverage-lead {
    font-size: 17px;
    color: var(--text);
    margin-bottom: 24px;
    font-weight: 500;
}

.coverage-list {
    margin-bottom: 32px;
}

.coverage-list li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 0;
    font-size: 15px;
    color: var(--text);
    border-bottom: 1px dashed var(--border);
    transition: var(--transition);
}

.coverage-list li:hover {
    padding-left: 8px;
    color: var(--primary);
}

.coverage-check {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    font-weight: 700;
    font-size: 12px;
    flex-shrink: 0;
    margin-top: 2px;
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.3);
}

.coverage-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.coverage-screenshots {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.coverage-screenshot {
    width: 180px;
    border-radius: 18px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
    border: 4px solid #fff;
    transition: var(--transition);
}

.coverage-screenshot:hover {
    transform: translateY(-6px) rotate(0deg) scale(1.03);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
}

.coverage-screenshot-1 {
    transform: rotate(-3deg);
}

.coverage-screenshot-2 {
    transform: rotate(3deg);
}

.coverage-card {
    background: linear-gradient(135deg, #1a0b2e 0%, #2d1b4e 50%, #3d2466 100%);
    border-radius: var(--radius-lg);
    padding: 44px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    box-shadow: 0 20px 60px rgba(76, 29, 149, 0.3);
    position: relative;
    overflow: hidden;
}

.coverage-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.2) 0%, transparent 70%);
    pointer-events: none;
}

.coverage-card::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -50%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
    pointer-events: none;
}

.coverage-stat {
    text-align: center;
    padding: 18px;
    position: relative;
    z-index: 1;
    border-radius: 12px;
    transition: var(--transition);
}

.coverage-stat:hover {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(8px);
    transform: translateY(-4px);
}

.coverage-num {
    display: block;
    font-size: 40px;
    font-weight: 900;
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.coverage-label {
    display: block;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 6px;
    letter-spacing: 0.04em;
}

/* ========== 深度数据看板 Detail Showcase ========== */
.detail-showcase {
    padding: 100px 0;
    background: var(--bg);
}

.detail-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.detail-image {
    position: relative;
    text-align: center;
}

.detail-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: 20px;
    bottom: 20px;
    background: linear-gradient(135deg, var(--accent), var(--gold));
    border-radius: 24px;
    opacity: 0.12;
    z-index: 0;
}

.detail-image img {
    position: relative;
    z-index: 1;
    max-width: 320px;
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
    border: 6px solid #fff;
}

.detail-text h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--primary);
    margin: 22px 0 8px;
    padding-left: 14px;
    border-left: 4px solid var(--accent);
}

.detail-text h3:first-child {
    margin-top: 0;
}

.detail-text p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 6px;
}

.detail-text .btn {
    margin-top: 24px;
}

/* ========== 合作店铺 Partners ========== */
.partners {
    padding: 100px 0;
    background: var(--bg-light);
}

.partners-image {
    max-width: 880px;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: #fff;
    padding: 16px;
}

.partners-image img {
    width: 100%;
    border-radius: var(--radius);
    display: block;
}

/* ========== 服务流程 Service ========== */
.service {
    padding: 100px 0;
    background: var(--bg);
}

.service-image {
    max-width: 760px;
    margin: 0 auto;
    background: linear-gradient(135deg, #fff5e6 0%, #ffe9d4 100%);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
}

.service-image img {
    width: 100%;
    border-radius: var(--radius);
    display: block;
}

/* ========== 特别声明 Notice ========== */
.notice {
    padding: 100px 0;
    background: var(--bg-light);
}

.notice-image {
    max-width: 760px;
    margin: 0 auto;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--shadow);
}

.notice-image img {
    width: 100%;
    border-radius: var(--radius);
    display: block;
}

/* ========== 下载指南 Download ========== */
.download {
    padding: 100px 0;
    background: var(--bg);
}

.download-intro {
    margin-bottom: 48px;
}

.download-intro-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 36px;
    border-left: 4px solid var(--accent);
}

.download-intro-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 14px;
}

.download-intro-card p {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 14px;
}

.download-intro-card ul {
    list-style: disc;
    padding-left: 20px;
}

.download-intro-card li {
    font-size: 14px;
    color: var(--text);
    margin-bottom: 8px;
    line-height: 1.7;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.download-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: var(--transition);
    text-align: center;
}

.download-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.download-card-icon {
    font-size: 44px;
    margin-bottom: 16px;
}

.download-card h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 18px;
}

.download-card ol {
    text-align: left;
    list-style: decimal;
    padding-left: 20px;
    margin-bottom: 24px;
}

.download-card ol li {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 8px;
    line-height: 1.6;
}

/* 安全注意事项 */
.download-safety {
    margin-bottom: 48px;
}

.download-safety h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
}

.safety-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.safety-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background: var(--bg-light);
    border-radius: var(--radius);
    padding: 20px;
}

.safety-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.safety-item strong {
    display: block;
    font-size: 15px;
    color: var(--primary);
    margin-bottom: 4px;
}

.safety-item p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

/* 常见问题 */
.download-faq h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-sm);
}

.faq-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
}

.faq-item p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ========== 联系我们 Contact ========== */
.contact {
    padding: 100px 0;
    background:
        radial-gradient(ellipse at 50% 0%, rgba(139, 92, 246, 0.08) 0%, transparent 60%),
        var(--bg-light);
    position: relative;
}

.contact-content {
    max-width: 680px;
    margin: 0 auto;
}

.contact-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 56px 44px;
    box-shadow: 0 20px 60px rgba(76, 29, 149, 0.12);
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(139, 92, 246, 0.1);
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.contact-card-header h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.contact-card-header p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 32px;
}

.contact-card-header strong {
    color: var(--accent);
}

.wechat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.wechat-item {
    background: linear-gradient(135deg, #faf9fc 0%, #f3eefe 100%);
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    border: 1px solid rgba(139, 92, 246, 0.1);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.wechat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s;
}

.wechat-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(139, 92, 246, 0.15);
}

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

.wechat-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 12px;
}

.wechat-copy-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.wechat-id {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    background: #fff;
    padding: 8px 16px;
    border-radius: 6px;
    border: 1px solid var(--border);
    font-family: "SF Mono", "Consolas", "Monaco", monospace;
    letter-spacing: 0.04em;
}

.contact-guarantee {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 28px;
    padding: 14px;
    background: #f0fdf4;
    border-radius: var(--radius);
}

.contact-guarantee span {
    color: #16a34a;
    font-weight: 500;
}

.contact-register {
    margin-top: 8px;
}

/* ========== 页脚 Footer ========== */
.footer {
    background: linear-gradient(180deg, #0d0420 0%, #1a0b2e 100%);
    color: rgba(255, 255, 255, 0.7);
    padding: 70px 0 30px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.5), transparent);
}

.footer::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    letter-spacing: 0.04em;
}

.footer-brand p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.8;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a,
.footer-col ul li {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
    line-height: 2;
}

.footer-seo {
    margin-top: 4px;
    font-size: 11px !important;
    color: rgba(255, 255, 255, 0.25) !important;
}

/* ========== Toast 提示 ========== */
.toast {
    position: fixed;
    top: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: var(--gradient-purple);
    color: #fff;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 12px 32px rgba(139, 92, 246, 0.4);
    backdrop-filter: blur(10px);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ========== 回到顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 22px;
    font-weight: 700;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    box-shadow: 0 8px 24px rgba(139, 92, 246, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 8px 24px rgba(139, 92, 246, 0.4);
    }
    50% {
        box-shadow: 0 8px 32px rgba(236, 72, 153, 0.6);
    }
}

.back-to-top:hover {
    transform: translateY(-6px) scale(1.05);
    box-shadow: 0 12px 32px rgba(236, 72, 153, 0.55);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .coverage-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .download-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .safety-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }

    /* Logo */
    .logo-img {
        width: 32px;
        height: 32px;
    }
    .hero-logo {
        width: 90px;
        height: 90px;
    }

    /* 详情布局调整 */
    .detail-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .detail-image img {
        max-width: 240px;
    }
    .coverage-screenshot {
        width: 140px;
    }
    .partners,
    .service,
    .notice,
    .detail-showcase {
        padding: 60px 0;
    }

    /* 移动端导航 */
    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--bg-dark);
        padding: 16px 0;
        transform: translateY(-110%);
        transition: transform 0.35s ease;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
        z-index: 999;
    }

    .nav.open {
        transform: translateY(0);
    }

    .nav-list {
        flex-direction: column;
        gap: 2px;
    }

    .nav-link {
        padding: 12px 24px;
        font-size: 16px;
    }

    .header-actions {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .download-grid {
        grid-template-columns: 1fr;
    }

    .faq-grid {
        grid-template-columns: 1fr;
    }

    .wechat-grid {
        grid-template-columns: 1fr;
    }

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

    .hero-btns {
        flex-direction: column;
        align-items: center;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-badge {
        gap: 8px;
    }

    .hero-badge span {
        font-size: 12px;
        padding: 5px 12px;
    }

    .coverage-card {
        padding: 24px;
        gap: 16px;
    }

    .coverage-num {
        font-size: 28px;
    }

    .contact-card {
        padding: 28px 20px;
    }
}

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

    .hero-text {
        font-size: 15px;
    }

    .section-title {
        font-size: 24px;
    }

    .features {
        padding: 60px 0;
    }

    .coverage {
        padding: 60px 0;
    }

    .download {
        padding: 60px 0;
    }

    .contact {
        padding: 60px 0;
    }
}