/* ========================================
   乐鱼(leyu)官方网站 - 完整样式表
   风格：现代渐变 + 毛玻璃 + 圆角卡片
   响应式：PC + 手机自适应
   暗色模式：支持
   动画：滚动、hover、渐变
   ======================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    color: #1a1a2e;
    transition: background 0.4s ease, color 0.4s ease;
    line-height: 1.6;
    min-height: 100vh;
}

body.dark {
    background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 100%);
    color: #e0e0e0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* ---------- 通用组件 ---------- */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 50px;
    background: linear-gradient(135deg, #e94560, #c23152, #a01e3e);
    background-size: 200% 200%;
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.5px;
    border: none;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.3);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.6s;
}

.btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 35px rgba(233, 69, 96, 0.5);
    background-position: right center;
}

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

.btn:active {
    transform: translateY(-1px) scale(0.98);
}

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

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #e94560, #1a1a2e);
    border-radius: 2px;
    opacity: 0.3;
}

.section-title {
    text-align: center;
    font-size: 2.6rem;
    font-weight: 800;
    margin-bottom: 18px;
    background: linear-gradient(135deg, #e94560 0%, #1a1a2e 50%, #e94560 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleShimmer 4s ease-in-out infinite;
    letter-spacing: -0.5px;
}

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

.section-sub {
    text-align: center;
    color: #666;
    margin-bottom: 60px;
    font-size: 1.15rem;
    font-weight: 400;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

body.dark .section-sub {
    color: #aaa;
}

.card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 35px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.06);
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
}

body.dark .card {
    background: rgba(30, 30, 50, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.05);
}

.card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #e94560, #1a1a2e);
    opacity: 0;
    transition: opacity 0.4s;
}

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

.card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

body.dark .card:hover {
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

/* ---------- 网格系统 ---------- */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 35px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

@media (max-width: 992px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    .section {
        padding: 60px 0;
    }
    .section-title {
        font-size: 2rem;
    }
    .section-sub {
        font-size: 1rem;
        margin-bottom: 40px;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 1.7rem;
    }
    .card {
        padding: 25px 20px;
    }
}

/* ---------- 头部导航 ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(25px) saturate(180%);
    -webkit-backdrop-filter: blur(25px) saturate(180%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: background 0.4s ease, box-shadow 0.4s;
}

body.dark .header {
    background: rgba(15, 15, 26, 0.85);
    backdrop-filter: blur(25px) saturate(180%);
    -webkit-backdrop-filter: blur(25px) saturate(180%);
    border-color: rgba(255, 255, 255, 0.06);
}

.header.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}

body.dark .header.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 75px;
}

.logo {
    font-size: 1.9rem;
    font-weight: 900;
    background: linear-gradient(135deg, #e94560, #1a1a2e, #e94560);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    animation: logoShimmer 5s ease-in-out infinite;
    letter-spacing: -0.5px;
}

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

.nav-links {
    display: flex;
    gap: 35px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: #1a1a2e;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
    padding: 5px 0;
}

body.dark .nav-links a {
    color: #e0e0e0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, #e94560, #c23152);
    border-radius: 2px;
    transition: width 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.nav-links a:hover {
    color: #e94560;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.3s;
}

.hamburger:hover {
    background: rgba(233, 69, 96, 0.1);
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: #1a1a2e;
    border-radius: 3px;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

body.dark .hamburger span {
    background: #e0e0e0;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

.dark-toggle {
    background: none;
    border: 2px solid rgba(233, 69, 96, 0.4);
    color: #e94560;
    border-radius: 50%;
    width: 42px;
    height: 42px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
}

.dark-toggle::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, #e94560, #1a1a2e);
    opacity: 0;
    transition: opacity 0.4s;
}

.dark-toggle:hover {
    border-color: #e94560;
    transform: rotate(180deg) scale(1.1);
    box-shadow: 0 0 20px rgba(233, 69, 96, 0.3);
}

.dark-toggle:hover::before {
    opacity: 0.1;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 75px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(25px);
        -webkit-backdrop-filter: blur(25px);
        flex-direction: column;
        padding: 25px 20px;
        gap: 20px;
        border-bottom: 1px solid rgba(0, 0, 0, 0.06);
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
        animation: slideDown 0.35s ease;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    body.dark .nav-links {
        background: rgba(15, 15, 26, 0.98);
        border-color: rgba(255, 255, 255, 0.06);
    }

    .nav-links.active {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .nav-links a {
        font-size: 1.05rem;
        padding: 10px 0;
    }
}

/* ---------- 英雄区 (Hero) ---------- */
.hero {
    position: relative;
    height: 100vh;
    min-height: 650px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #0f0c29 0%, #1a1a2e 30%, #16213e 60%, #0f3460 100%);
    background-size: 400% 400%;
    animation: heroBgMove 15s ease infinite;
}

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

.hero-slides {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.2s ease, transform 1.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    color: #fff;
    text-align: center;
    padding: 30px;
    transform: scale(0.95);
}

.hero-slide.active {
    opacity: 1;
    transform: scale(1);
}

.hero-slide h1 {
    font-size: 3.8rem;
    font-weight: 900;
    margin-bottom: 22px;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
    letter-spacing: -1px;
    line-height: 1.15;
    background: linear-gradient(135deg, #fff, #e0e0e0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-slide p {
    font-size: 1.3rem;
    max-width: 650px;
    margin-bottom: 35px;
    opacity: 0.92;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    line-height: 1.7;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.2) 100%);
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
}

.hero-dots {
    position: absolute;
    bottom: 35px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 14px;
    z-index: 3;
}

.hero-dots span {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 2px solid transparent;
    position: relative;
}

.hero-dots span::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid transparent;
    transition: border-color 0.4s;
}

.hero-dots span.active {
    background: #e94560;
    border-color: #fff;
    transform: scale(1.25);
    box-shadow: 0 0 20px rgba(233, 69, 96, 0.5);
}

.hero-dots span.active::after {
    border-color: rgba(233, 69, 96, 0.3);
}

.hero-dots span:hover {
    background: rgba(233, 69, 96, 0.6);
}

@media (max-width: 768px) {
    .hero {
        min-height: 550px;
    }
    .hero-slide h1 {
        font-size: 2.2rem;
    }
    .hero-slide p {
        font-size: 1rem;
        max-width: 100%;
    }
    .hero-dots {
        bottom: 25px;
    }
}

@media (max-width: 480px) {
    .hero-slide h1 {
        font-size: 1.8rem;
    }
    .hero-slide p {
        font-size: 0.9rem;
    }
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
    padding: 20px 0;
    font-size: 0.9rem;
    color: #888;
    background: transparent;
}

.breadcrumb a {
    color: #e94560;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.breadcrumb a:hover {
    color: #c23152;
    text-decoration: underline;
}

.breadcrumb span {
    margin: 0 10px;
    color: #bbb;
}

/* ---------- 关于我们 ---------- */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.about-text h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 22px;
    background: linear-gradient(135deg, #e94560, #1a1a2e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-text p {
    margin-bottom: 18px;
    color: #555;
    line-height: 1.8;
}

body.dark .about-text p {
    color: #bbb;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 35px;
}

.stat-item {
    text-align: center;
    padding: 25px 15px;
    background: rgba(233, 69, 96, 0.07);
    border-radius: 20px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(233, 69, 96, 0.1);
}

.stat-item:hover {
    transform: translateY(-5px) scale(1.03);
    background: rgba(233, 69, 96, 0.12);
    box-shadow: 0 10px 30px rgba(233, 69, 96, 0.15);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 900;
    color: #e94560;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    margin-top: 8px;
    font-weight: 500;
}

body.dark .stat-label {
    color: #aaa;
}

/* ---------- 团队 ---------- */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

@media (max-width: 992px) {
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .team-grid {
        grid-template-columns: 1fr;
    }
}

.team-card {
    text-align: center;
    padding: 35px 20px;
}

.team-card .avatar {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e94560, #1a1a2e);
    margin: 0 auto 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.8rem;
    color: #fff;
    font-weight: 700;
    box-shadow: 0 8px 30px rgba(233, 69, 96, 0.25);
    transition: transform 0.4s, box-shadow 0.4s;
}

.team-card:hover .avatar {
    transform: scale(1.08) rotate(-5deg);
    box-shadow: 0 12px 40px rgba(233, 69, 96, 0.35);
}

.team-card h4 {
    margin-bottom: 6px;
    font-size: 1.15rem;
}

.team-card p {
    color: #888;
    font-size: 0.9rem;
}

/* ---------- 产品 ---------- */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
}

.product-card {
    text-align: center;
    padding: 40px 25px;
}

.product-card .icon {
    font-size: 3.5rem;
    margin-bottom: 18px;
    display: block;
    transition: transform 0.4s;
}

.product-card:hover .icon {
    transform: scale(1.2) rotate(10deg);
}

.product-card h3 {
    margin-bottom: 12px;
    font-size: 1.3rem;
}

.product-card p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.7;
}

body.dark .product-card p {
    color: #aaa;
}

/* ---------- 特性 ---------- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    display: flex;
    gap: 22px;
    align-items: flex-start;
    padding: 30px;
}

.feature-card .icon {
    font-size: 2.2rem;
    flex-shrink: 0;
    width: 65px;
    height: 65px;
    background: rgba(233, 69, 96, 0.1);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s;
}

.feature-card:hover .icon {
    background: rgba(233, 69, 96, 0.2);
    transform: scale(1.1) rotate(-5deg);
}

.feature-card h4 {
    margin-bottom: 10px;
    font-size: 1.15rem;
}

.feature-card p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.7;
}

body.dark .feature-card p {
    color: #aaa;
}

/* ---------- 解决方案 ---------- */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

@media (max-width: 768px) {
    .solution-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------- 行业 ---------- */
.industry-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

@media (max-width: 992px) {
    .industry-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .industry-grid {
        grid-template-columns: 1fr;
    }
}

.industry-item {
    text-align: center;
    padding: 28px 15px;
    background: rgba(233, 69, 96, 0.05);
    border-radius: 18px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    font-weight: 600;
    font-size: 1.05rem;
    border: 1px solid rgba(233, 69, 96, 0.08);
    cursor: default;
}

.industry-item:hover {
    background: rgba(233, 69, 96, 0.15);
    transform: translateY(-5px) scale(1.03);
    box-shadow: 0 10px 30px rgba(233, 69, 96, 0.1);
    border-color: rgba(233, 69, 96, 0.2);
}

/* ---------- 合作伙伴 ---------- */
.partners-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 45px;
    padding: 30px 0;
}

.partner-item {
    width: 130px;
    height: 65px;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #888;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    font-size: 0.9rem;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

body.dark .partner-item {
    background: rgba(255, 255, 255, 0.04);
    color: #aaa;
    border-color: rgba(255, 255, 255, 0.04);
}

.partner-item:hover {
    background: rgba(233, 69, 96, 0.1);
    color: #e94560;
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(233, 69, 96, 0.1);
    border-color: rgba(233, 69, 96, 0.2);
}

/* ---------- 评价 ---------- */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

@media (max-width: 768px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

.testimonial-card {
    position: relative;
    padding-top: 45px;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 10px;
    left: 30px;
    font-size: 5rem;
    color: #e94560;
    opacity: 0.15;
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-card .author {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-top: 25px;
}

.testimonial-card .author .avatar {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e94560, #c23152);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 1.2rem;
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.2);
}

/* ---------- 新闻 ---------- */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

@media (max-width: 768px) {
    .news-grid {
        grid-template-columns: 1fr;
    }
}

.news-card .date {
    color: #e94560;
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.news-card h4 {
    margin-bottom: 12px;
    font-size: 1.15rem;
    line-height: 1.4;
}

.news-card p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 18px;
    line-height: 1.7;
}

body.dark .news-card p {
    color: #aaa;
}

.news-card .read-more {
    color: #e94560;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.news-card .read-more:hover {
    color: #c23152;
    gap: 10px;
}

/* ---------- FAQ ---------- */
.faq-item {
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    padding: 20px 0;
    cursor: pointer;
    transition: background 0.3s;
}

body.dark .faq-item {
    border-color: rgba(255, 255, 255, 0.08);
}

.faq-item:hover {
    background: rgba(233, 69, 96, 0.02);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 700;
    font-size: 1.1rem;
    padding: 0 5px;
}

.faq-question .arrow {
    transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    font-size: 1.2rem;
    color: #e94560;
}

.faq-item.active .faq-question .arrow {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, padding 0.5s ease, opacity 0.4s;
    color: #666;
    padding-top: 0;
    opacity: 0;
    line-height: 1.7;
}

body.dark .faq-answer {
    color: #aaa;
}

.faq-item.active .faq-answer {
    max-height: 350px;
    padding-top: 15px;
    opacity: 1;
}

/* ---------- 联系方式 ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

.contact-info h3 {
    margin-bottom: 25px;
    font-size: 1.4rem;
    color: #e94560;
}

.contact-info p {
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid rgba(0, 0, 0, 0.06);
    border-radius: 16px;
    font-size: 1rem;
    margin-bottom: 18px;
    transition: all 0.35s ease;
    background: #fff;
    color: #1a1a2e;
    font-family: inherit;
}

body.dark .contact-form input,
body.dark .contact-form textarea {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
    color: #e0e0e0;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #e94560;
    box-shadow: 0 0 0 4px rgba(233, 69, 96, 0.1);
    transform: translateY(-1px);
}

body.dark .contact-form input:focus,
body.dark .contact-form textarea:focus {
    box-shadow: 0 0 0 4px rgba(233, 69, 96, 0.15);
}

.contact-form textarea {
    height: 130px;
    resize: vertical;
}

/* ---------- EEAT 区块 ---------- */
.eeat-section {
    background: rgba(233, 69, 96, 0.04);
    border-radius: 24px;
    padding: 35px;
    margin-top: 45px;
    border: 1px solid rgba(233, 69, 96, 0.06);
}

body.dark .eeat-section {
    background: rgba(255, 255, 255, 0.02);
    border-color: rgba(255, 255, 255, 0.04);
}

.eeat-section h3 {
    color: #e94560;
    margin-bottom: 25px;
    font-size: 1.3rem;
}

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

@media (max-width: 768px) {
    .eeat-grid {
        grid-template-columns: 1fr;
    }
}

.eeat-item {
    padding: 18px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 14px;
    transition: all 0.3s;
}

body.dark .eeat-item {
    background: rgba(255, 255, 255, 0.03);
}

.eeat-item:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateX(3px);
}

body.dark .eeat-item:hover {
    background: rgba(255, 255, 255, 0.06);
}

.eeat-item strong {
    display: block;
    margin-bottom: 6px;
    color: #1a1a2e;
    font-size: 1rem;
}

body.dark .eeat-item strong {
    color: #e0e0e0;
}

.eeat-item p {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.6;
}

body.dark .eeat-item p {
    color: #aaa;
}

/* ---------- 使用指南 ---------- */
.howto-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

@media (max-width: 768px) {
    .howto-steps {
        grid-template-columns: 1fr;
    }
}

.howto-step {
    text-align: center;
    padding: 35px 20px;
}

.howto-step .step-num {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e94560, #c23152);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    font-weight: 800;
    margin: 0 auto 18px;
    box-shadow: 0 6px 25px rgba(233, 69, 96, 0.25);
    transition: transform 0.4s, box-shadow 0.4s;
}

.howto-step:hover .step-num {
    transform: scale(1.1);
    box-shadow: 0 10px 35px rgba(233, 69, 96, 0.35);
}

/* ---------- 服务支持 ---------- */
.service-support {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

@media (max-width: 768px) {
    .service-support {
        grid-template-columns: 1fr;
    }
}

.support-card {
    text-align: center;
    padding: 35px 20px;
}

.support-card .icon {
    font-size: 2.8rem;
    margin-bottom: 18px;
    display: block;
    transition: transform 0.4s;
}

.support-card:hover .icon {
    transform: scale(1.15) rotate(-5deg);
}

/* ---------- 搜索栏 ---------- */
.search-bar {
    display: flex;
    max-width: 520px;
    margin: 0 auto 50px;
    border-radius: 50px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: box-shadow 0.3s;
}

.search-bar:focus-within {
    box-shadow: 0 4px 30px rgba(233, 69, 96, 0.15);
}

.search-bar input {
    flex: 1;
    padding: 16px 24px;
    border: 2px solid rgba(0, 0, 0, 0.06);
    border-right: none;
    border-radius: 50px 0 0 50px;
    font-size: 1rem;
    background: #fff;
    color: #1a1a2e;
    transition: border-color 0.3s;
}

body.dark .search-bar input {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.08);
    color: #e0e0e0;
}

.search-bar input:focus {
    outline: none;
    border-color: #e94560;
}

.search-bar button {
    padding: 16px 30px;
    background: linear-gradient(135deg, #e94560, #c23152);
    color: #fff;
    border: none;
    border-radius: 0 50px 50px 0;
    cursor: pointer;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.3s;
    white-space: nowrap;
}

.search-bar button:hover {
    background: linear-gradient(135deg, #c23152, #a01e3e);
    transform: scale(1.02);
}

/* ---------- 页脚 ---------- */
.footer {
    background: linear-gradient(135deg, #1a1a2e 0%, #0f0c29 100%);
    color: #ccc;
    padding: 70px 0 35px;
    margin-top: 80px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #e94560, #1a1a2e, #e94560);
}

.footer .grid-4 {
    color: #ccc;
}

.footer h4 {
    color: #fff;
    margin-bottom: 22px;
    font-size: 1.15rem;
    font-weight: 700;
    position: relative;
    padding-bottom: 10px;
}

.footer h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 3px;
    background: #e94560;
    border-radius: 2px;
}

.footer a {
    color: #aaa;
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    padding: 2px 0;
}

.footer a:hover {
    color: #e94560;
    transform: translateX(5px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 30px;
    margin-top: 50px;
    text-align: center;
    font-size: 0.9rem;
}

.footer-bottom p {
    margin-bottom: 6px;
    opacity: 0.8;
}

/* ---------- 返回顶部 ---------- */
.scroll-top {
    position: fixed;
    bottom: 35px;
    right: 35px;
    width: 55px;
    height: 55px;
    background: linear-gradient(135deg, #e94560, #c23152);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.6rem;
    box-shadow: 0 6px 25px rgba(233, 69, 96, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 10px 35px rgba(233, 69, 96, 0.5);
}

.scroll-top:active {
    transform: scale(0.9);
}

/* ---------- 滚动动画 (Intersection Observer 配合) ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.fade-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.fade-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.fade-in-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ---------- 暗色模式额外微调 ---------- */
body.dark ::selection {
    background: rgba(233, 69, 96, 0.4);
    color: #fff;
}

body ::selection {
    background: rgba(233, 69, 96, 0.2);
    color: #1a1a2e;
}

/* ---------- 响应式微调 ---------- */
@media (max-width: 1200px) {
    .container {
        padding: 0 25px;
    }
}

@media (max-width: 768px) {
    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
    .stat-item {
        padding: 18px 10px;
    }
    .stat-number {
        font-size: 2rem;
    }
    .stat-label {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .about-stats {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    .hero-dots span {
        width: 12px;
        height: 12px;
    }
    .scroll-top {
        width: 48px;
        height: 48px;
        font-size: 1.3rem;
        bottom: 25px;
        right: 25px;
    }
    .footer .grid-4 {
        gap: 30px;
    }
}

/* ---------- 打印样式 ---------- */
@media print {
    .header, .scroll-top, .dark-toggle, .hamburger, .hero-dots, .search-bar {
        display: none !important;
    }
    .hero {
        height: auto;
        min-height: auto;
        padding: 60px 0;
    }
    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
    body {
        background: #fff;
        color: #000;
    }
    .section {
        padding: 40px 0;
    }
}