/* ========== 基础变量 - 明亮现代风 ========== */
:root {
    --primary: #1e3a5f;
    --primary-light: #2d4a6f;
    --accent: #f97316;
    --accent-light: #fb923c;
    --accent-dark: #ea580c;
    --cyan: #0891b2;
    --cyan-light: #22d3ee;
    --green: #10b981;
    --text: #1e293b;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --bg: #ffffff;
    --bg-soft: #f8fafc;
    --bg-warm: #fff7ed;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 4px 12px rgba(0,0,0,0.05);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
    --shadow-lg: 0 16px 40px rgba(0,0,0,0.08);
    --shadow-xl: 0 24px 60px rgba(0,0,0,0.1);
    --radius: 18px;
    --radius-sm: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255,255,255,0.95);
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 12px;
    color: white;
    font-size: 20px;
    font-weight: 700;
}

.logo-text { display: flex; flex-direction: column; line-height: 1.3; }
.logo-main { font-size: 18px; font-weight: 700; color: var(--text); letter-spacing: 0.5px; }
.logo-sub { font-size: 11px; color: var(--text-light); font-weight: 400; }

.nav-menu { display: flex; list-style: none; gap: 4px; }
.nav-link {
    display: block;
    padding: 8px 16px;
    text-decoration: none;
    color: var(--text-light);
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
    color: var(--primary);
    background: rgba(30,58,95,0.06);
}

.nav-phone {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(249,115,22,0.3);
}
.nav-phone:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(249,115,22,0.4);
}

.phone-icon { width: 16px; height: 16px; }

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========== Hero ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    overflow: hidden;
    background: linear-gradient(165deg, #ffffff 0%, #f0f7ff 40%, #fff7ed 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(ellipse 60% 50% at 85% 20%, rgba(249,115,22,0.08), transparent),
        radial-gradient(ellipse 50% 40% at 15% 80%, rgba(8,145,178,0.06), transparent),
        radial-gradient(ellipse 40% 30% at 50% 10%, rgba(30,58,95,0.04), transparent);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(30,58,95,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30,58,95,0.03) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse 70% 60% at 60% 40%, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 60% 40%, black 30%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding-top: 40px;
    padding-bottom: 100px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(16,185,129,0.08);
    border: 1px solid rgba(16,185,129,0.2);
    color: var(--green);
    font-size: 13px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease-out;
}
.hero-badge .badge-dot {
    width: 8px; height: 8px;
    background: var(--green);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

.hero-title {
    font-size: clamp(38px, 5vw, 58px);
    font-weight: 900;
    color: var(--text);
    line-height: 1.15;
    margin-bottom: 20px;
    animation: fadeInUp 0.6s ease-out 0.1s both;
    letter-spacing: -1px;
}
.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-title .accent-text {
    color: var(--accent);
    -webkit-text-fill-color: var(--accent);
}

.hero-desc {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 32px;
    line-height: 1.8;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-cta {
    display: flex;
    gap: 14px;
    margin-bottom: 48px;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: white;
    box-shadow: 0 8px 24px rgba(249,115,22,0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(249,115,22,0.4);
}

.btn-outline {
    background: white;
    color: var(--text);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: var(--shadow);
}

.btn-cta {
    background: var(--text);
    color: white;
    padding: 16px 32px;
    box-shadow: var(--shadow-lg);
}
.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    background: var(--primary);
}

.btn-text { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.3; }
.btn-label { font-size: 11px; font-weight: 500; color: var(--text-lighter); letter-spacing: 0.5px; }
.btn-number { font-size: 20px; font-weight: 800; color: white; letter-spacing: 0.5px; }

.hero-stats {
    display: flex;
    gap: 40px;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}
.stat-item { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 6px; }
.stat-num {
    font-size: 34px;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
}
.stat-unit { font-size: 15px; font-weight: 700; color: var(--accent); }
.stat-label { width: 100%; font-size: 13px; color: var(--text-light); margin-top: 4px; }

/* Hero 视觉 */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 1s ease-out 0.3s both;
}

.lock-showcase {
    position: relative;
    width: 360px;
    height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lock-ring-outer {
    position: absolute;
    width: 340px;
    height: 340px;
    border: 2px solid rgba(249,115,22,0.1);
    border-radius: 50%;
    animation: pulse-ring 4s ease-in-out infinite;
}

.lock-ring {
    position: absolute;
    width: 260px;
    height: 260px;
    border: 2px solid rgba(8,145,178,0.1);
    border-radius: 50%;
    animation: pulse-ring 4s ease-in-out infinite 1s;
}

.lock-core {
    position: relative;
    width: 140px;
    height: 140px;
    background: linear-gradient(135deg, rgba(30,58,95,0.06), rgba(249,115,22,0.06));
    border: 2px solid rgba(30,58,95,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: float 5s ease-in-out infinite;
    box-shadow:
        0 0 60px rgba(249,115,22,0.08),
        0 0 120px rgba(8,145,178,0.05),
        inset 0 0 40px rgba(249,115,22,0.03);
}

.lock-icon {
    width: 56px;
    height: 56px;
    color: var(--primary);
}

.orbit {
    position: absolute;
    border: 1.5px dashed rgba(30,58,95,0.06);
    border-radius: 50%;
    animation: orbit-rotate linear infinite;
}

.orbit::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    top: -5px;
    left: 50%;
    margin-left: -5px;
}

.orbit-1 {
    width: 200px; height: 200px;
    animation-duration: 12s;
}
.orbit-1::after { background: var(--accent); box-shadow: 0 0 10px rgba(249,115,22,0.4); }

.orbit-2 {
    width: 260px; height: 260px;
    animation-duration: 18s;
    animation-direction: reverse;
}
.orbit-2::after { background: var(--cyan); box-shadow: 0 0 10px rgba(8,145,178,0.4); }

.orbit-3 {
    width: 320px; height: 320px;
    animation-duration: 24s;
}
.orbit-3::after { background: var(--green); box-shadow: 0 0 10px rgba(16,185,129,0.4); }

.float-icon {
    position: absolute;
    width: 28px;
    height: 28px;
    color: var(--text-light);
    animation: float-icon 6s ease-in-out infinite;
    animation-delay: var(--delay);
    transform: translate(var(--x), var(--y));
    opacity: 0.6;
}

.float-tag {
    position: absolute;
    padding: 6px 14px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-light);
    box-shadow: var(--shadow);
    animation: float-icon 6s ease-in-out infinite;
    animation-delay: var(--delay);
    transform: translate(var(--x), var(--y));
    white-space: nowrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-lighter);
    font-size: 12px;
    animation: fadeIn 1s ease-out 1s both;
}
.scroll-mouse {
    width: 22px; height: 34px;
    border: 2px solid var(--border);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}
.scroll-wheel {
    width: 3px; height: 6px;
    background: var(--accent);
    border-radius: 2px;
    animation: scroll-wheel 2s ease-in-out infinite;
}

/* ========== 通用区块标题 ========== */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}
.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(249,115,22,0.08);
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    border-radius: 100px;
    margin-bottom: 14px;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.section-title {
    font-size: clamp(28px, 4vw, 38px);
    font-weight: 900;
    color: var(--text);
    margin-bottom: 12px;
    line-height: 1.3;
    letter-spacing: -0.5px;
}
.section-desc {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ========== 服务区块 ========== */
.services {
    padding: 100px 0;
    background: var(--bg);
}
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.service-card {
    position: relative;
    padding: 32px 24px;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
    overflow: hidden;
}
.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.service-card.featured {
    background: linear-gradient(135deg, #fff7ed, #f0f9ff);
    border-color: rgba(249,115,22,0.15);
}
.service-card.featured .service-icon-wrap {
    background: linear-gradient(135deg, rgba(249,115,22,0.1), rgba(8,145,178,0.08));
}

.service-badge {
    position: absolute;
    top: 14px;
    right: 14px;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: white;
    font-size: 11px;
    font-weight: 700;
    border-radius: 100px;
    letter-spacing: 0.5px;
}

.service-icon-wrap {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(30,58,95,0.06);
    border-radius: 14px;
    margin-bottom: 18px;
    transition: var(--transition);
}
.service-icon {
    width: 24px;
    height: 24px;
    color: var(--primary);
}
.service-card:hover .service-icon-wrap {
    background: rgba(249,115,22,0.1);
}
.service-card:hover .service-icon {
    color: var(--accent);
}

.service-title { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.service-desc { font-size: 14px; color: var(--text-light); line-height: 1.7; margin-bottom: 14px; }
.service-features {
    list-style: none;
    font-size: 13px;
    color: var(--text-lighter);
    line-height: 2;
}
.service-features li {
    display: flex;
    align-items: center;
    gap: 6px;
}
.service-features li::before {
    content: '';
    display: inline-block;
    width: 5px;
    height: 5px;
    background: var(--accent);
    border-radius: 50%;
    flex-shrink: 0;
}

/* ========== 产品区块 ========== */
.products {
    padding: 100px 0;
    background: var(--bg-soft);
}
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.product-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
}
.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.product-img {
    position: relative;
    height: 200px;
    background: linear-gradient(135deg, #f0f7ff, #fff7ed);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.product-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(30,58,95,0.04), transparent 70%);
}

.product-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    position: relative;
    z-index: 1;
}
.placeholder-icon {
    width: 56px;
    height: 56px;
    color: var(--primary);
    opacity: 0.5;
}
.placeholder-text {
    font-size: 13px;
    color: var(--text-lighter);
    font-weight: 500;
}

.product-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: white;
    font-size: 11px;
    font-weight: 700;
    border-radius: 100px;
    z-index: 1;
    letter-spacing: 0.5px;
}
.product-tag.hot {
    background: linear-gradient(135deg, #ec4899, #be185d);
}

.product-info { padding: 22px; }
.product-name { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.product-desc { font-size: 13px; color: var(--text-light); margin-bottom: 12px; }

.product-price {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}
.price-current {
    font-size: 24px;
    font-weight: 900;
    color: var(--accent);
}
.price-original {
    font-size: 13px;
    color: var(--text-lighter);
    text-decoration: line-through;
}
.price-discount {
    padding: 2px 8px;
    background: rgba(249,115,22,0.08);
    color: var(--accent);
    font-size: 11px;
    font-weight: 700;
    border-radius: 6px;
    border: 1px solid rgba(249,115,22,0.15);
}

.product-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--text-lighter);
}

.products-cta { text-align: center; }
.products-cta p { color: var(--text-light); margin-bottom: 16px; }

/* ========== 为什么选择我们 ========== */
.whyus {
    padding: 100px 0;
    background: var(--bg);
}
.whyus-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.whyus-item {
    display: flex;
    gap: 18px;
    padding: 24px;
    background: white;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.whyus-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}
.whyus-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(249,115,22,0.08), rgba(8,145,178,0.06));
    border: 1px solid rgba(249,115,22,0.1);
    border-radius: 14px;
    color: var(--accent);
}
.whyus-icon svg {
    width: 22px;
    height: 22px;
}
.whyus-content h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}
.whyus-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ========== CTA 横幅 ========== */
.cta-banner {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary), #0f2847);
    position: relative;
    overflow: hidden;
}
.cta-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(ellipse 50% 60% at 80% 50%, rgba(249,115,22,0.1), transparent),
        radial-gradient(ellipse 40% 50% at 20% 50%, rgba(8,145,178,0.08), transparent);
}
.cta-content {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}
.cta-text h2 {
    font-size: clamp(26px, 4vw, 36px);
    font-weight: 900;
    color: white;
    margin-bottom: 10px;
    line-height: 1.3;
}
.cta-text h2 .glow { color: var(--accent-light); }
.cta-text p {
    font-size: 16px;
    color: rgba(255,255,255,0.7);
}

/* ========== 联系我们 ========== */
.contact {
    padding: 100px 0;
    background: var(--bg-soft);
}
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.contact-card {
    text-align: center;
    padding: 32px 20px;
    background: white;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.contact-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.contact-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(30,58,95,0.06), rgba(249,115,22,0.06));
    border-radius: 14px;
    color: var(--primary);
}
.contact-icon svg {
    width: 24px;
    height: 24px;
}
.contact-card h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}
.contact-info {
    font-size: 16px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}
.contact-note {
    font-size: 12px;
    color: var(--text-lighter);
}

/* 微信二维码 */
.wechat-card { position: relative; }
.qr-wrap {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}
.qr-code {
    width: 100px;
    height: 100px;
    border-radius: 10px;
    border: 1px solid var(--border);
    padding: 4px;
    background: white;
    object-fit: contain;
    transition: var(--transition);
}
.contact-card:hover .qr-code {
    transform: scale(1.04);
    box-shadow: var(--shadow);
}
.qr-tip {
    font-size: 11px;
    color: var(--text-lighter);
    letter-spacing: 0.5px;
}

/* ========== 页脚 ========== */
.footer {
    background: var(--bg);
    color: var(--text-light);
    padding: 64px 0 0;
    border-top: 1px solid var(--border);
}
.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}
.footer-logo .logo-icon {
    width: 40px;
    height: 40px;
    font-size: 18px;
}
.footer-logo-main {
    font-size: 17px;
    font-weight: 700;
    color: var(--text);
    display: block;
    line-height: 1.3;
}
.footer-logo-sub { font-size: 11px; color: var(--text-light); }
.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-light);
}
.footer-links h4,
.footer-contact h4 {
    font-size: 13px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 18px;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}
.footer-links a:hover {
    color: var(--accent);
    padding-left: 4px;
}
.footer-contact p {
    font-size: 14px;
    margin-bottom: 10px;
    color: var(--text-light);
}
.footer-qr {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}
.footer-qr img {
    width: 52px;
    height: 52px;
    border-radius: 8px;
    border: 1px solid var(--border);
    padding: 3px;
    background: white;
    object-fit: contain;
}
.footer-qr span {
    font-size: 12px;
    color: var(--text-lighter);
}
.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: var(--text-lighter);
    border-top: 1px solid var(--border);
}

/* ========== 悬浮电话按钮 ========== */
.float-call {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    box-shadow: 0 8px 24px rgba(249,115,22,0.35);
    z-index: 999;
    transition: var(--transition);
    animation: float-call 4s ease-in-out infinite;
}
.float-call svg {
    width: 24px;
    height: 24px;
}
.float-call:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 32px rgba(249,115,22,0.45);
}

/* ========== 动画 ========== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes pulse-ring {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.04); opacity: 0.6; }
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}
@keyframes float-icon {
    0%, 100% { transform: translate(var(--x), var(--y)) translateY(0); opacity: 0.5; }
    50% { transform: translate(var(--x), var(--y)) translateY(-15px); opacity: 0.8; }
}
@keyframes orbit-rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
@keyframes scroll-wheel {
    0%, 100% { opacity: 1; transform: translateY(0); }
    50% { opacity: 0.3; transform: translateY(6px); }
}
@keyframes float-call {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0; right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .mobile-toggle { display: flex; }
    .nav-phone .phone-text { display: none; }

    .hero-content { grid-template-columns: 1fr; text-align: center; gap: 40px; }
    .hero-visual { order: -1; }
    .lock-showcase { width: 280px; height: 280px; }
    .hero-stats { justify-content: center; }
    .hero-cta { justify-content: center; }

    .services-grid { grid-template-columns: 1fr; }
    .products-grid { grid-template-columns: 1fr; }
    .whyus-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .cta-content { flex-direction: column; text-align: center; }
    .footer-content { grid-template-columns: 1fr; gap: 36px; }
}

/* ========== 滚动显现动画 ========== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.active {
    opacity: 1;
    transform: translateY(0);
}