/* ============================================
   182体育 · 能量流体设计系统
   "燃动非凡" — 运动流体 + 玻璃态 + 渐变能量
   配色：珊瑚橙 · 青碧 · 暖米白 · 亮金
   ============================================ */

/* 基础重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    overflow-x: hidden;
    background: #FCF9F2;
    color: #2D3436;
    line-height: 1.6;
}

/* 核心布局 — 必须居中 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 90px 0;
    position: relative;
}

.section:nth-child(even) {
    background: linear-gradient(135deg, #F0F7F4 0%, #F7F0F6 100%);
}

/* 导航 — 固定顶部 + 玻璃态 */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(252, 249, 242, 0.82);
    backdrop-filter: blur(20px) saturate(1.8);
    -webkit-backdrop-filter: blur(20px) saturate(1.8);
    border-bottom: 1px solid rgba(46, 196, 182, 0.18);
    box-shadow: 0 1px 30px rgba(255, 107, 53, 0.06);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 28px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.35rem;
    text-decoration: none;
    color: #2D3436;
    letter-spacing: -0.5px;
    position: relative;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    background: linear-gradient(135deg, #FF6B35, #FF8F65);
    color: #fff;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.main-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    color: #2D3436;
    transition: all 0.3s ease;
    position: relative;
    padding: 4px 0;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2.5px;
    background: linear-gradient(90deg, #FF6B35, #2EC4B6);
    border-radius: 2px;
    transition: width 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.main-nav a:hover {
    color: #FF6B35;
}

.main-nav a:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 10px 24px !important;
    border-radius: 50px !important;
    color: #fff !important;
    font-weight: 600 !important;
    background: linear-gradient(135deg, #FF6B35, #FF8F65);
    box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
    border: none !important;
    transition: all 0.3s ease !important;
}

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

.nav-cta:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 28px rgba(255, 107, 53, 0.4);
    color: #fff !important;
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: rgba(46, 196, 182, 0.1);
    border-radius: 10px;
    border: none;
    font-size: 1.3rem;
    color: #2D3436;
    transition: 0.3s;
}

.menu-toggle:hover {
    background: rgba(255, 107, 53, 0.15);
}

/* ========== HERO ========== */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(
        165deg,
        #FCF9F2 0%,
        #F5F0EB 30%,
        #F0F7F4 70%,
        #FCF9F2 100%
    );
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(46, 196, 182, 0.07) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    max-width: 760px;
    position: relative;
    z-index: 2;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 6px 18px;
    border-radius: 50px;
    margin-bottom: 18px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(46, 196, 182, 0.12));
    color: #FF6B35;
    letter-spacing: 2px;
    text-transform: uppercase;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 107, 53, 0.15);
}

.hero h1 {
    font-size: 3.6rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 22px;
    background: linear-gradient(135deg, #2D3436 0%, #FF6B35 50%, #2EC4B6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1.5px;
}

.hero p {
    font-size: 1.15rem;
    opacity: 0.75;
    max-width: 580px;
    margin-bottom: 36px;
    line-height: 1.7;
    color: #4A5568;
}

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

.hero-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(255, 107, 53, 0.12);
    position: relative;
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    font-size: 0.95rem;
    letter-spacing: 0.3px;
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, #FF6B35, #FF8F65);
    box-shadow: 0 6px 24px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 40px rgba(255, 107, 53, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid #2EC4B6;
    color: #2EC4B6;
}

.btn-outline:hover {
    background: rgba(46, 196, 182, 0.08);
    border-color: #FF6B35;
    color: #FF6B35;
    transform: translateY(-2px);
}

/* ========== 标签/标题 ========== */
.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 14px;
    text-transform: uppercase;
    color: #FF6B35;
    padding: 4px 16px;
    border-radius: 50px;
    background: rgba(255, 107, 53, 0.08);
}

.section-title {
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.2;
    letter-spacing: -0.5px;
    color: #2D3436;
}

.section-desc {
    max-width: 640px;
    opacity: 0.7;
    margin-bottom: 44px;
    font-size: 1.05rem;
    color: #4A5568;
    line-height: 1.7;
}

/* ========== 卡片网格 ========== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 28px;
}

.category-card {
    border-radius: 18px;
    padding: 32px 28px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #FF6B35, #2EC4B6, #FFD93D);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(255, 107, 53, 0.12);
    border-color: rgba(255, 107, 53, 0.15);
}

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

.card-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 1.4rem;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(46, 196, 182, 0.1));
    color: #FF6B35;
    transition: 0.3s;
}

.category-card:hover .card-icon {
    background: linear-gradient(135deg, #FF6B35, #FF8F65);
    color: #fff;
    transform: scale(1.05);
}

.card-link {
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    color: #2EC4B6;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: 0.3s;
}

.card-link:hover {
    color: #FF6B35;
    gap: 12px;
}

/* ========== 特性块 ========== */
.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.feature-image {
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(46, 196, 182, 0.1);
    position: relative;
}

.feature-image::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    pointer-events: none;
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
}

.feature-text {
    padding: 8px 0;
}

.feature-list {
    list-style: none;
    margin-top: 20px;
}

.feature-list li {
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    color: #4A5568;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list li::before {
    content: '✦';
    font-weight: 700;
    color: #FF6B35;
    font-size: 0.9rem;
}

/* ========== 数据条 ========== */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    text-align: center;
}

.stat-item {
    padding: 32px 20px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    transition: 0.4s ease;
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #FF6B35, #2EC4B6);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(255, 107, 53, 0.08);
}

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

.stat-number {
    font-size: 2.6rem;
    font-weight: 900;
    background: linear-gradient(135deg, #FF6B35, #2EC4B6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.6;
    margin-top: 8px;
    color: #4A5568;
    font-weight: 500;
}

/* ========== 内容墙 ========== */
.content-wall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 28px;
}

.content-wall-item {
    border-radius: 18px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.content-wall-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(46, 196, 182, 0.1);
    border-color: rgba(46, 196, 182, 0.2);
}

.content-wall-item img {
    width: 100%;
    height: 210px;
    object-fit: cover;
    transition: 0.5s ease;
}

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

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

/* ========== FAQ ========== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid rgba(46, 196, 182, 0.15);
    border-radius: 14px;
    margin-bottom: 10px;
    overflow: hidden;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(6px);
    transition: 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(255, 107, 53, 0.2);
    box-shadow: 0 4px 16px rgba(255, 107, 53, 0.04);
}

.faq-item .faq-question {
    padding: 18px 24px;
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #2D3436;
    font-size: 1.05rem;
    transition: 0.3s;
}

.faq-item .faq-question::after {
    content: '＋';
    font-size: 1.1rem;
    color: #2EC4B6;
    transition: 0.4s ease;
    font-weight: 300;
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
    color: #FF6B35;
}

.faq-item .faq-answer {
    padding: 0 24px 18px;
    display: none;
    opacity: 0.75;
    color: #4A5568;
    line-height: 1.7;
}

.faq-item.open .faq-answer {
    display: block;
    animation: fadeSlideIn 0.4s ease;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 0.75;
        transform: translateY(0);
    }
}

/* ========== CTA横幅 ========== */
.cta-banner {
    padding: 64px 32px;
    text-align: center;
    border-radius: 20px;
    color: #fff;
    background: linear-gradient(135deg, #FF6B35 0%, #FF8F65 40%, #2EC4B6 100%);
    box-shadow: 0 16px 56px rgba(255, 107, 53, 0.25);
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
    pointer-events: none;
    animation: ctaGlow 8s ease-in-out infinite alternate;
}

@keyframes ctaGlow {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-20%, -20%); }
}

.cta-banner h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: #fff;
    position: relative;
    z-index: 1;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
    font-size: 1.05rem;
}

.cta-banner .btn-primary {
    background: #fff;
    color: #FF6B35;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* ========== 页脚 ========== */
.site-footer {
    padding: 64px 0 32px;
    background: #2D3436;
    color: rgba(255, 255, 255, 0.7);
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #FF6B35, #2EC4B6, #FFD93D);
}

.site-footer .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.footer-brand {
    color: rgba(255, 255, 255, 0.8);
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 12px;
}

.footer-brand .logo-icon {
    background: linear-gradient(135deg, #FF6B35, #2EC4B6);
}

.footer-col h4 {
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

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

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

.footer-col ul a {
    color: rgba(255, 255, 255, 0.55);
    text-decoration: none;
    transition: 0.3s;
    font-size: 0.9rem;
}

.footer-col ul a:hover {
    color: #FFD93D;
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: 44px;
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ========== 工具类 ========== */
.text-accent {
    color: #FF6B35;
}

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

.seo-description {
    max-width: 640px;
    margin: 0 auto 52px;
    opacity: 0.7;
    color: #4A5568;
    line-height: 1.7;
}

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

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

/* ========== 响应式 ========== */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.8rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 64px;
        padding: 0 20px;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: rgba(252, 249, 242, 0.97);
        backdrop-filter: blur(20px);
        padding: 20px 24px;
        flex-direction: column;
        gap: 12px;
        border-bottom: 1px solid rgba(46, 196, 182, 0.12);
        box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
    }

    .main-nav.open {
        display: flex;
    }

    .main-nav a {
        padding: 12px 0;
        font-size: 1rem;
        border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    }

    .main-nav a:last-child {
        border-bottom: none;
    }

    .nav-cta {
        text-align: center;
        margin-top: 4px;
    }

    .menu-toggle {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: 100px 0 60px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

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

    .feature-block {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .feature-image {
        order: -1;
    }

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

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

    .stat-number {
        font-size: 2rem;
    }

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

    .footer-brand {
        grid-column: 1 / -1;
    }

    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }

    .content-wall {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

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

    .cards-grid,
    .content-wall,
    .stats-bar {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

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

    .cta-banner {
        padding: 40px 20px;
    }

    .cta-banner h2 {
        font-size: 1.6rem;
    }

    .section {
        padding: 48px 0;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .feature-block {
        gap: 28px;
    }
}

/* ========== 额外装饰元素 ========== */
/* 流体装饰线 — 用于分割区域 */
.section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 107, 53, 0.1), rgba(46, 196, 182, 0.1), transparent);
}

.section:last-child::after {
    display: none;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #FCF9F2;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #FF6B35, #2EC4B6);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #FF8F65;
}

/* 选中文本样式 */
::selection {
    background: rgba(255, 107, 53, 0.2);
    color: #2D3436;
}

/* 链接通用样式 */
a {
    color: #2EC4B6;
    transition: 0.3s;
}

a:hover {
    color: #FF6B35;
}

/* 图片响应式 */
img {
    max-width: 100%;
    height: auto;
}

/* 强调文本 */
strong {
    color: #FF6B35;
    font-weight: 700;
}