/* ========================================
   高登棋牌 - 完整样式表
   ======================================== */

/* 全局重置与变量 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #f8f9fc;
    --text: #1a1a2e;
    --card: #ffffff;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --glass: rgba(255, 255, 255, 0.6);
    --border: rgba(255, 255, 255, 0.2);
    --primary: #1a1a2e;
    --accent: #f0c040;
    --accent2: #e94560;
    --grad1: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    --grad2: linear-gradient(135deg, #f0c040, #e94560);
    --radius: 20px;
    --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

body.dark {
    --bg: #0f0f23;
    --text: #e0e0e0;
    --card: #1a1a2e;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --glass: rgba(26, 26, 46, 0.7);
    --border: rgba(255, 255, 255, 0.08);
    --primary: #0f0f23;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
    overflow-x: hidden;
}

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

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

/* ====== 通用组件 ====== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-sub {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
    font-size: 1.1rem;
    opacity: 0.7;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    background: var(--grad2);
    color: #fff;
    box-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(233, 69, 96, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--accent);
    color: #1a1a2e;
}

.glass {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.text-accent {
    color: var(--accent);
}

.text-accent2 {
    color: var(--accent2);
}

.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.stagger > * {
    transition-delay: calc(var(--i, 0) * 0.1s);
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    .container {
        padding: 0 16px;
    }
}

/* ====== 头部导航 ====== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: background var(--transition), box-shadow var(--transition);
}

header.scrolled {
    background: var(--glass);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo svg {
    width: 36px;
    height: 36px;
}

.nav {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav a {
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 4px 0;
    transition: color var(--transition);
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition);
}

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

.nav a:hover {
    color: var(--accent);
}

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

.menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--text);
    border-radius: 3px;
    transition: all var(--transition);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg);
    z-index: 999;
    padding: 80px 24px 24px;
    flex-direction: column;
    gap: 20px;
    overflow-y: auto;
}

.mobile-menu.open {
    display: flex;
}

.mobile-menu a {
    font-size: 1.4rem;
    font-weight: 600;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.theme-toggle {
    background: none;
    border: 2px solid var(--border);
    border-radius: 50px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    color: var(--text);
    font-size: 1.2rem;
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

@media (max-width: 900px) {
    .nav {
        display: none;
    }
    .menu-toggle {
        display: flex;
    }
}

/* ====== 英雄区域 ====== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: var(--grad1);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 50%, rgba(240, 192, 64, 0.15) 0%, transparent 60%),
                radial-gradient(circle at 80% 30%, rgba(233, 69, 96, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    color: #fff;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero h1 span {
    background: var(--grad2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 560px;
    margin-bottom: 36px;
}

.hero-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    position: absolute;
    right: -5%;
    top: 50%;
    transform: translateY(-50%);
    width: 45%;
    max-width: 600px;
    opacity: 0.6;
    pointer-events: none;
}

@media (max-width: 900px) {
    .hero-visual {
        display: none;
    }
    .hero-content {
        max-width: 100%;
    }
}

/* ====== Banner轮播 ====== */
.banner-carousel {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    margin-top: 40px;
}

.banner-slide {
    display: none;
    padding: 60px 40px;
    background: var(--grad1);
    color: #fff;
    border-radius: var(--radius);
    min-height: 300px;
    align-items: center;
}

.banner-slide.active {
    display: flex;
}

.banner-slide h3 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.banner-slide p {
    opacity: 0.8;
    max-width: 500px;
}

.banner-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.banner-dots button {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--accent);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.banner-dots button.active {
    background: var(--accent);
    transform: scale(1.2);
}

/* ====== 统计数据 ====== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 24px;
    margin-top: 60px;
}

.stat-item {
    text-align: center;
    padding: 24px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--grad2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    margin-top: 8px;
    opacity: 0.7;
    font-weight: 500;
}

/* ====== 产品网格 ====== */
.products-grid .card {
    text-align: center;
    padding: 40px 24px;
}

.products-grid .card svg {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
}

.products-grid .card h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
}

/* ====== 时间线 ====== */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 16px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--grad2);
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 20px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -32px;
    top: 8px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--bg);
}

.timeline-year {
    font-weight: 800;
    color: var(--accent);
    font-size: 1.2rem;
}

/* ====== FAQ ====== */
.faq-item {
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
    cursor: pointer;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
}

.faq-question svg {
    width: 24px;
    height: 24px;
    transition: transform var(--transition);
    flex-shrink: 0;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, padding 0.3s ease;
    padding-top: 0;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding-top: 16px;
}

/* ====== 联系表单 ====== */
.contact-form {
    display: grid;
    gap: 20px;
    max-width: 600px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px 20px;
    border-radius: 12px;
    border: 2px solid var(--border);
    background: var(--card);
    color: var(--text);
    font-size: 1rem;
    transition: border var(--transition);
    outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--accent);
}

.contact-form textarea {
    min-height: 140px;
    resize: vertical;
}

/* ====== 页脚 ====== */
footer {
    background: var(--grad1);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 30px;
}

footer a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition);
}

footer a:hover {
    color: var(--accent);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-grid h4 {
    color: #fff;
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.footer-grid ul {
    list-style: none;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.9rem;
}

/* ====== 返回顶部 ====== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--grad2);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    box-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
    transition: all var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(233, 69, 96, 0.4);
}

/* ====== 搜索框 ====== */
.search-box {
    display: flex;
    gap: 8px;
    max-width: 400px;
    margin: 0 auto 40px;
}

.search-box input {
    flex: 1;
    padding: 12px 20px;
    border-radius: 50px;
    border: 2px solid var(--border);
    background: var(--card);
    color: var(--text);
    font-size: 1rem;
    outline: none;
    transition: border var(--transition);
}

.search-box input:focus {
    border-color: var(--accent);
}

.search-box button {
    padding: 12px 24px;
    border-radius: 50px;
    background: var(--grad2);
    color: #fff;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition);
}

.search-box button:hover {
    transform: scale(1.05);
}

/* ====== 合作伙伴 ====== */
.partner-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    align-items: center;
}

.partner-logos svg {
    height: 40px;
    opacity: 0.5;
    transition: opacity var(--transition);
}

.partner-logos svg:hover {
    opacity: 0.8;
}

/* ====== 客户评价 ====== */
.testimonial-card {
    padding: 32px;
    position: relative;
}

.testimonial-card::before {
    content: '"';
    font-size: 4rem;
    position: absolute;
    top: 8px;
    left: 20px;
    opacity: 0.1;
    font-weight: 900;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
}

.testimonial-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--grad2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #fff;
    font-size: 1.2rem;
}

/* ====== 步骤指南 ====== */
.howto-steps {
    counter-reset: step;
}

.howto-step {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    align-items: flex-start;
}

.howto-step::before {
    counter-increment: step;
    content: counter(step);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--grad2);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

/* ====== 新闻卡片 ====== */
.news-card .date {
    font-size: 0.85rem;
    opacity: 0.6;
    margin-bottom: 8px;
}

.news-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.news-card p {
    opacity: 0.7;
    font-size: 0.95rem;
}

/* ====== 面包屑 ====== */
.breadcrumb {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    font-size: 0.9rem;
    opacity: 0.7;
    margin-bottom: 20px;
}

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

/* ====== EEAT 区块 ====== */
.eeat-section {
    background: var(--card);
    border-radius: var(--radius);
    padding: 40px;
    margin-top: 40px;
}

.eeat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.eeat-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.eeat-item svg {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    margin-top: 4px;
}

/* ====== 隐藏的 Schema 数据 ====== */
.schema-hidden {
    display: none;
}