/* ===== 重置与基础 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f4f6fb;
    color: #1e1e2f;
    line-height: 1.7;
    transition: background 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

body.dark {
    background: #0b0b1a;
    color: #e4e4f0;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

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

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: none;
    cursor: pointer;
    background: linear-gradient(135deg, #1a1a3e, #16213e);
    color: #fff;
    box-shadow: 0 4px 14px rgba(0,0,0,0.08);
    letter-spacing: 0.3px;
}
.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}
.btn:active { transform: scale(0.97); }

.btn-primary {
    background: linear-gradient(135deg, #f5c842, #e6a800);
    color: #1a1a2e;
}
.btn-primary:hover {
    background: linear-gradient(135deg, #f5d060, #d99b00);
    box-shadow: 0 10px 30px rgba(240,192,64,0.3);
}

/* ===== 节标题 ===== */
.section { padding: 90px 0; }

.section-title {
    font-size: 2.4rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
    color: #1a1a2e;
    position: relative;
    display: inline-block;
    width: 100%;
    letter-spacing: -0.5px;
}
body.dark .section-title { color: #f5c842; }

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #f5c842, #e6a800);
    border-radius: 4px;
    margin: 12px auto 0;
}

.section-subtitle {
    text-align: center;
    color: #6b6b80;
    margin-bottom: 50px;
    font-size: 1.1rem;
    font-weight: 400;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
body.dark .section-subtitle { color: #a0a0b8; }

/* ===== 卡片系统 ===== */
.card {
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.04), 0 2px 8px rgba(0,0,0,0.02);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(255,255,255,0.3);
    will-change: transform;
}
body.dark .card {
    background: rgba(20,20,45,0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}
body.dark .card:hover {
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
    border-color: rgba(245,200,66,0.15);
}

/* ===== 网格 ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.flex-center { display: flex; align-items: center; justify-content: center; }
.text-center { text-align: center; }

.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.mb-40 { margin-bottom: 40px; }

/* ===== 品牌渐变背景 ===== */
.brand-gradient {
    background: linear-gradient(135deg, #0d0d1a 0%, #1a1a3e 40%, #16213e 70%, #0f3460 100%);
}

.brand-gold { color: #f5c842; }

/* ===== 头部导航 ===== */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(13,13,26,0.88);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(255,255,255,0.04);
    transition: background 0.3s ease, box-shadow 0.3s ease;
}
.header.scrolled {
    background: rgba(13,13,26,0.96);
    box-shadow: 0 4px 30px rgba(0,0,0,0.2);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: #f5c842;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.3px;
}
.logo svg { width: 36px; height: 36px; flex-shrink: 0; }

.nav {
    display: flex;
    gap: 32px;
    align-items: center;
}
.nav a {
    color: rgba(255,255,255,0.75);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
    padding: 6px 0;
    letter-spacing: 0.2px;
}
.nav a:hover,
.nav a.active { color: #f5c842; }
.nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: #f5c842;
    border-radius: 4px;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}
.nav a:hover::after,
.nav a.active::after { width: 100%; }

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.dark-toggle {
    background: none;
    border: none;
    color: #f5c842;
    font-size: 1.3rem;
    cursor: pointer;
    padding: 6px;
    border-radius: 50%;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.dark-toggle:hover {
    background: rgba(255,255,255,0.08);
    transform: rotate(15deg);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.8rem;
    cursor: pointer;
    padding: 6px;
    transition: transform 0.2s;
}
.menu-toggle:hover { transform: scale(1.1); }

/* ===== 面包屑 ===== */
.breadcrumb {
    margin-top: 72px;
    background: rgba(255,255,255,0.02);
    padding: 14px 0;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.55);
    border-bottom: 1px solid rgba(255,255,255,0.04);
}
.breadcrumb a { color: rgba(255,255,255,0.7); transition: color 0.2s; }
.breadcrumb a:hover { color: #f5c842; }
.breadcrumb .current { color: #f5c842; font-weight: 500; }

/* ===== Hero 主视觉 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #0b0b1a 0%, #1a1a3e 30%, #16213e 60%, #0f3460 100%);
    padding-top: 72px;
}
.hero::before {
    content: '';
    position: absolute;
    top: -30%; left: -20%;
    width: 70%; height: 140%;
    background: radial-gradient(circle at 30% 40%, rgba(245,200,66,0.06), transparent 60%);
    pointer-events: none;
}

.hero-slider {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    display: flex;
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.hero-slide {
    min-width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 24px;
}
.hero-content {
    text-align: center;
    max-width: 820px;
    position: relative;
    z-index: 2;
    animation: heroFadeIn 1s ease forwards;
}
@keyframes heroFadeIn {
    0% { opacity: 0; transform: translateY(30px); }
    100% { opacity: 1; transform: translateY(0); }
}

.hero-title {
    font-size: 3.8rem;
    font-weight: 900;
    color: #fff;
    margin-bottom: 20px;
    line-height: 1.15;
    text-shadow: 0 4px 40px rgba(0,0,0,0.3);
    letter-spacing: -1px;
}
.hero-title span { color: #f5c842; }

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.75);
    margin-bottom: 36px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

.hero-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-indicators {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 5;
}
.hero-indicators button {
    width: 14px; height: 14px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.4);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}
.hero-indicators button.active {
    background: #f5c842;
    border-color: #f5c842;
    transform: scale(1.2);
    box-shadow: 0 0 20px rgba(245,200,66,0.3);
}
.hero-indicators button:hover { border-color: #f5c842; }

/* ===== About ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.about-text h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #1a1a2e;
}
body.dark .about-text h2 { color: #f5c842; }
.about-text p {
    color: #555;
    margin-bottom: 16px;
    line-height: 1.8;
}
body.dark .about-text p { color: #c8c8e0; }

.about-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
    transition: transform 0.5s ease;
}
.about-image:hover { transform: scale(1.02); }

/* ===== Values ===== */
.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.value-item {
    text-align: center;
    padding: 32px 20px;
}
.value-icon {
    width: 72px; height: 72px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: linear-gradient(135deg, rgba(245,200,66,0.15), rgba(245,200,66,0.05));
    color: #f5c842;
    transition: transform 0.4s ease;
}
.value-item:hover .value-icon { transform: scale(1.1) rotate(5deg); }

.value-item h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #1a1a2e;
}
body.dark .value-item h4 { color: #f5c842; }
.value-item p { color: #777; font-size: 0.95rem; }
body.dark .value-item p { color: #a0a0b8; }

/* ===== Team ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.team-card {
    text-align: center;
    padding: 28px 16px;
}
.team-avatar {
    width: 100px; height: 100px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, #1a1a3e, #0f3460);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.6rem;
    color: #f5c842;
    transition: transform 0.4s ease;
}
.team-card:hover .team-avatar { transform: scale(1.05); }

.team-card h4 {
    font-size: 1.1rem;
    margin-bottom: 6px;
    color: #1a1a2e;
}
body.dark .team-card h4 { color: #f5c842; }
.team-card p { color: #888; font-size: 0.9rem; }
body.dark .team-card p { color: #a0a0b8; }

/* ===== Products ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.product-card {
    padding: 28px 24px;
    text-align: center;
}
.product-icon {
    width: 64px; height: 64px;
    margin: 0 auto 18px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    background: linear-gradient(135deg, rgba(245,200,66,0.12), rgba(245,200,66,0.04));
    color: #f5c842;
    transition: transform 0.3s;
}
.product-card:hover .product-icon { transform: scale(1.1) rotate(-3deg); }

.product-card h4 {
    font-size: 1.15rem;
    margin-bottom: 10px;
    color: #1a1a2e;
}
body.dark .product-card h4 { color: #f5c842; }
.product-card p { color: #777; font-size: 0.9rem; margin-bottom: 18px; }
body.dark .product-card p { color: #a0a0b8; }
.product-card .btn { font-size: 0.85rem; padding: 8px 22px; }

/* ===== Advantages ===== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.advantage-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 28px;
}
.advantage-icon {
    width: 54px; height: 54px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: linear-gradient(135deg, rgba(245,200,66,0.12), rgba(245,200,66,0.04));
    color: #f5c842;
    flex-shrink: 0;
    transition: transform 0.3s;
}
.advantage-item:hover .advantage-icon { transform: scale(1.1); }

.advantage-item h4 {
    font-size: 1.1rem;
    margin-bottom: 6px;
    color: #1a1a2e;
}
body.dark .advantage-item h4 { color: #f5c842; }
.advantage-item p { color: #777; font-size: 0.9rem; }
body.dark .advantage-item p { color: #a0a0b8; }

/* ===== Cases ===== */
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.case-card { overflow: hidden; padding: 0; }
.case-image {
    height: 200px;
    background: linear-gradient(135deg, #1a1a3e, #0f3460);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #f5c842;
    font-size: 1.2rem;
    font-weight: 600;
    transition: transform 0.5s ease;
}
.case-card:hover .case-image { transform: scale(1.03); }

.case-body { padding: 22px 24px; }
.case-body h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: #1a1a2e;
}
body.dark .case-body h4 { color: #f5c842; }
.case-body p { color: #777; font-size: 0.9rem; }
body.dark .case-body p { color: #a0a0b8; }

/* ===== Testimonials ===== */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.testimonial-card { text-align: center; padding: 32px 24px; }
.testimonial-stars { color: #f5c842; font-size: 1.2rem; margin-bottom: 16px; letter-spacing: 2px; }
.testimonial-text {
    font-style: italic;
    color: #555;
    margin-bottom: 20px;
    line-height: 1.7;
}
body.dark .testimonial-text { color: #c8c8e0; }
.testimonial-author { font-weight: 600; color: #1a1a2e; }
body.dark .testimonial-author { color: #f5c842; }
.testimonial-role { color: #999; font-size: 0.85rem; }

/* ===== Partners ===== */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
    align-items: center;
}
.partner-item {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    font-weight: 600;
    color: #888;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}
body.dark .partner-item { color: #a0a0b8; }
.partner-item:hover {
    background: rgba(245,200,66,0.08);
    border-color: #f5c842;
    color: #f5c842;
    transform: translateY(-4px);
}

/* ===== News ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.news-card { overflow: hidden; padding: 0; }
.news-image {
    height: 180px;
    background: linear-gradient(135deg, #16213e, #0f3460);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #f5c842;
    font-size: 1rem;
    font-weight: 600;
    transition: transform 0.5s;
}
.news-card:hover .news-image { transform: scale(1.03); }

.news-body { padding: 22px 24px; }
.news-date { color: #999; font-size: 0.85rem; margin-bottom: 8px; }
body.dark .news-date { color: #a0a0b8; }
.news-body h4 {
    font-size: 1.05rem;
    margin-bottom: 8px;
    color: #1a1a2e;
    line-height: 1.4;
}
body.dark .news-body h4 { color: #f5c842; }
.news-body p { color: #777; font-size: 0.9rem; margin-bottom: 14px; }
body.dark .news-body p { color: #a0a0b8; }
.news-body .btn { font-size: 0.8rem; padding: 6px 18px; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    border-bottom: 1px solid rgba(0,0,0,0.06);
    padding: 16px 0;
}
body.dark .faq-item { border-color: rgba(255,255,255,0.06); }

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    padding: 12px 0;
    font-weight: 600;
    font-size: 1.05rem;
    color: #1a1a2e;
    transition: color 0.2s;
}
body.dark .faq-question { color: #f5c842; }
.faq-question:hover { color: #f5c842; }

.faq-toggle {
    font-size: 1.6rem;
    transition: transform 0.3s ease;
    color: #f5c842;
    font-weight: 300;
}
.faq-item.open .faq-toggle { transform: rotate(45deg); }

.faq-answer {
    padding: 0 0 16px;
    color: #666;
    line-height: 1.7;
    display: none;
}
body.dark .faq-answer { color: #c8c8e0; }
.faq-item.open .faq-answer { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ===== HowTo ===== */
.howto-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.howto-step {
    text-align: center;
    padding: 28px 16px;
    position: relative;
}
.howto-number {
    width: 52px; height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, #f5c842, #d99b00);
    color: #1a1a2e;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 auto 16px;
    transition: transform 0.3s;
}
.howto-step:hover .howto-number { transform: scale(1.1); }

.howto-step h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: #1a1a2e;
}
body.dark .howto-step h4 { color: #f5c842; }
.howto-step p { color: #777; font-size: 0.9rem; }
body.dark .howto-step p { color: #a0a0b8; }

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 44px;
}
.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #1a1a2e;
}
body.dark .contact-info h3 { color: #f5c842; }
.contact-info p {
    color: #666;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}
body.dark .contact-info p { color: #c8c8e0; }
.contact-info .icon { color: #f5c842; font-size: 1.2rem; width: 28px; text-align: center; }

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px 20px;
    border-radius: 14px;
    border: 1px solid #e0e0e8;
    background: #fff;
    font-size: 1rem;
    transition: all 0.3s ease;
    margin-bottom: 16px;
    font-family: inherit;
    color: #1e1e2f;
}
body.dark .contact-form input,
body.dark .contact-form textarea {
    background: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.08);
    color: #e4e4f0;
}
.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #f5c842;
    box-shadow: 0 0 0 3px rgba(245,200,66,0.15);
}
.contact-form textarea { height: 130px; resize: vertical; }

/* ===== Footer ===== */
.footer {
    background: #0a0a18;
    color: rgba(255,255,255,0.65);
    padding: 60px 0 30px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 44px;
    margin-bottom: 40px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    max-width: 320px;
    color: rgba(255,255,255,0.5);
}
.footer-col h4 {
    color: #f5c842;
    font-size: 1.1rem;
    margin-bottom: 20px;
    font-weight: 600;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
    transition: color 0.2s;
}
.footer-col ul li a:hover { color: #f5c842; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.85rem;
}
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a {
    color: rgba(255,255,255,0.4);
    transition: color 0.2s;
}
.footer-bottom-links a:hover { color: #f5c842; }

/* ===== Back to Top ===== */
#backToTop {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, #f5c842, #d99b00);
    color: #1a1a2e;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 24px rgba(245,200,66,0.25);
    z-index: 999;
    transition: all 0.3s ease;
}
#backToTop:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(245,200,66,0.35);
}
#backToTop:active { transform: scale(0.92); }

/* ===== Search Modal ===== */
.search-modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.65);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    animation: modalFadeIn 0.3s ease;
}
.search-modal.open { display: flex; }
@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.search-modal .search-box {
    background: #fff;
    border-radius: 24px;
    padding: 36px;
    width: 90%;
    max-width: 520px;
    box-shadow: 0 24px 80px rgba(0,0,0,0.2);
    position: relative;
}
body.dark .search-modal .search-box {
    background: #1a1a3e;
}

.search-modal input {
    width: 100%;
    padding: 18px 24px;
    border-radius: 14px;
    border: 2px solid #e0e0e8;
    font-size: 1.1rem;
    transition: border 0.3s;
    background: transparent;
    color: inherit;
}
body.dark .search-modal input {
    border-color: rgba(255,255,255,0.1);
    color: #e4e4f0;
}
.search-modal input:focus {
    outline: none;
    border-color: #f5c842;
}

.search-modal .search-close {
    position: absolute;
    top: 16px;
    right: 24px;
    background: none;
    border: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    transition: transform 0.2s;
}
.search-modal .search-close:hover { transform: rotate(90deg); }

/* ===== 统计数据动画 ===== */
.stat-number {
    font-size: 3rem;
    font-weight: 900;
    color: #f5c842;
    line-height: 1.2;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .values-grid,
    .team-grid,
    .product-grid,
    .case-grid,
    .testimonial-grid,
    .news-grid,
    .howto-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .partner-grid { grid-template-columns: repeat(4, 1fr); }
    .about-grid,
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-title { font-size: 2.8rem; }
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: fixed;
        top: 72px;
        left: 0; right: 0;
        background: rgba(13,13,26,0.96);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        flex-direction: column;
        padding: 24px;
        gap: 18px;
        border-bottom: 1px solid rgba(255,255,255,0.04);
    }
    .nav.open { display: flex; }
    .menu-toggle { display: block; }

    .values-grid,
    .team-grid,
    .product-grid,
    .case-grid,
    .testimonial-grid,
    .news-grid,
    .howto-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    .partner-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 2.2rem; }
    .hero-subtitle { font-size: 1.1rem; }
    .section { padding: 60px 0; }
    .section-title { font-size: 1.9rem; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .contact-grid { gap: 30px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.7rem; }
    .container { padding: 0 16px; }
    .hero-btns .btn { padding: 10px 22px; font-size: 0.9rem; }
    .partner-grid { grid-template-columns: repeat(2, 1fr); }
    .partner-item { height: 64px; font-size: 0.8rem; }
    #backToTop { width: 44px; height: 44px; bottom: 20px; right: 20px; font-size: 1.2rem; }
}

/* ===== 滚动动画（初始隐藏） ===== */
.card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.4s ease;
}
.card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 辅助工具 ===== */
@media (prefers-reduced-motion: reduce) {
    * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
    .card { opacity: 1; transform: none; }
}