/* ========== 基础变量 ========== */
:root {
    --c-bg: #ffffff;
    --c-bg-soft: #f6f8fc;
    --c-bg-dark: #0a1628;
    --c-text: #1a2b4a;
    --c-text-soft: #5a6a85;
    --c-text-light: #8b97ab;
    --c-primary: #0c6cff;
    --c-primary-dark: #0a52d4;
    --c-accent: #00c2a8;
    --c-border: #e6ecf5;
    --shadow-sm: 0 2px 8px rgba(15, 40, 90, 0.06);
    --shadow-md: 0 8px 30px rgba(15, 40, 90, 0.08);
    --shadow-lg: 0 20px 50px rgba(15, 40, 90, 0.12);
    --radius: 16px;
    --radius-sm: 10px;
    --maxw: 1200px;
    --header-h: 72px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--c-text);
    background: var(--c-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 通用按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all .25s ease;
    white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(135deg, var(--c-primary), #3b8bff);
    color: #fff;
    box-shadow: 0 8px 20px rgba(12, 108, 255, 0.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(12, 108, 255, 0.42); }
.btn-ghost {
    background: rgba(255,255,255,0.7);
    color: var(--c-text);
    border: 1.5px solid var(--c-border);
    backdrop-filter: blur(8px);
}
.btn-ghost:hover { border-color: var(--c-primary); color: var(--c-primary); transform: translateY(-2px); }

/* ========== Header 导航 ========== */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-h);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    z-index: 1000;
    transition: all .3s ease;
}
.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: var(--c-border);
    box-shadow: var(--shadow-sm);
}
.nav-container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo-icon {
    width: 40px; height: 40px;
    color: var(--c-primary);
    display: grid; place-items: center;
    background: linear-gradient(135deg, rgba(12,108,255,0.1), rgba(0,194,168,0.1));
    border-radius: 12px;
}
.logo-icon svg { width: 26px; height: 26px; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-name { font-size: 17px; font-weight: 700; color: var(--c-text); letter-spacing: .5px; }
.logo-sub { font-size: 11px; color: var(--c-text-light); letter-spacing: 1px; text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--c-text-soft);
    border-radius: 8px;
    transition: all .2s ease;
    position: relative;
}
.nav-link:hover { color: var(--c-primary); background: rgba(12,108,255,0.06); }
.nav-link.active { color: var(--c-primary); }
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px; left: 50%;
    transform: translateX(-50%);
    width: 18px; height: 3px;
    border-radius: 2px;
    background: var(--c-primary);
}
.nav-cta {
    margin-left: 12px;
    padding: 9px 22px;
    background: linear-gradient(135deg, var(--c-primary), #3b8bff);
    color: #fff !important;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 6px 16px rgba(12,108,255,0.3);
    transition: all .25s ease;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(12,108,255,0.4); background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary)) !important; }

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}
.menu-toggle span {
    width: 24px; height: 2px;
    background: var(--c-text);
    border-radius: 2px;
    transition: all .3s ease;
}
.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========== Hero 首屏 ========== */
.hero {
    position: relative;
    padding: calc(var(--header-h) + 80px) 0 90px;
    overflow: hidden;
    background: linear-gradient(180deg, #f3f7ff 0%, #ffffff 100%);
}
.hero-bg { position: absolute; inset: 0; z-index: 0; overflow: hidden; }
.hero-grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(12,108,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(12,108,255,0.04) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 80%);
}
.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}
.orb-1 {
    width: 480px; height: 480px;
    background: radial-gradient(circle, rgba(12,108,255,0.35), transparent 70%);
    top: -120px; right: -80px;
    animation: floatOrb 14s ease-in-out infinite;
}
.orb-2 {
    width: 420px; height: 420px;
    background: radial-gradient(circle, rgba(0,194,168,0.3), transparent 70%);
    bottom: -100px; left: -60px;
    animation: floatOrb 16s ease-in-out infinite reverse;
}
@keyframes floatOrb {
    0%,100% { transform: translate(0,0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.08); }
}

.hero-content { position: relative; z-index: 1; text-align: center; max-width: 820px; }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px;
    background: rgba(255,255,255,0.7);
    border: 1px solid rgba(12,108,255,0.15);
    border-radius: 50px;
    font-size: 13px;
    color: var(--c-primary);
    font-weight: 500;
    backdrop-filter: blur(8px);
    margin-bottom: 28px;
    box-shadow: var(--shadow-sm);
}
.hero-badge .dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--c-accent);
    box-shadow: 0 0 0 4px rgba(0,194,168,0.2);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(0,194,168,0.5); }
    70% { box-shadow: 0 0 0 8px rgba(0,194,168,0); }
    100% { box-shadow: 0 0 0 0 rgba(0,194,168,0); }
}
.hero-title {
    font-size: clamp(34px, 5.5vw, 60px);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.5px;
    margin-bottom: 24px;
}
.gradient-text {
    background: linear-gradient(120deg, var(--c-primary) 0%, var(--c-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.hero-desc {
    font-size: 17px;
    color: var(--c-text-soft);
    max-width: 680px;
    margin: 0 auto 36px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 56px;
    flex-wrap: wrap;
    padding-top: 36px;
    border-top: 1px solid var(--c-border);
}
.stat { text-align: center; }
.stat-num {
    font-size: 40px;
    font-weight: 800;
    color: var(--c-text);
    line-height: 1;
    background: linear-gradient(120deg, var(--c-primary), var(--c-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.stat-num sup { font-size: 20px; font-weight: 700; vertical-align: super; }
.stat-label { font-size: 14px; color: var(--c-text-light); margin-top: 8px; }

/* ========== 通用 Section ========== */
.section { padding: 100px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 60px; }
.section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--c-primary);
    background: rgba(12,108,255,0.08);
    padding: 6px 14px;
    border-radius: 50px;
    margin-bottom: 16px;
}
.section-tag.light { color: #fff; background: rgba(255,255,255,0.18); }
.section-title {
    font-size: clamp(28px, 3.6vw, 40px);
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}
.section-sub { font-size: 16px; color: var(--c-text-soft); }

/* ========== 核心业务 ========== */
.services { background: var(--c-bg); }
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.service-card {
    position: relative;
    padding: 36px 30px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    transition: all .35s cubic-bezier(.2,.8,.2,1);
    overflow: hidden;
}
.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .35s ease;
}
.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
    width: 60px; height: 60px;
    border-radius: 16px;
    display: grid; place-items: center;
    margin-bottom: 22px;
    transition: transform .35s ease;
}
.service-card:hover .service-icon { transform: scale(1.08) rotate(-4deg); }
.service-icon svg { width: 30px; height: 30px; }
.ic-blue { background: rgba(12,108,255,0.1); color: var(--c-primary); }
.ic-green { background: rgba(0,194,168,0.1); color: #00a890; }
.ic-orange { background: rgba(255,159,26,0.12); color: #e08600; }
.ic-purple { background: rgba(139,92,246,0.1); color: #7c5ce0; }
.ic-red { background: rgba(239,68,68,0.1); color: #e04545; }
.ic-teal { background: rgba(20,184,166,0.1); color: #0d9488; }
.service-card h3 { font-size: 21px; font-weight: 700; margin-bottom: 12px; }
.service-card > p { font-size: 14.5px; color: var(--c-text-soft); margin-bottom: 18px; }
.service-feats { display: flex; flex-direction: column; gap: 8px; }
.service-feats li {
    position: relative;
    padding-left: 24px;
    font-size: 14px;
    color: var(--c-text);
}
.service-feats li::before {
    content: '';
    position: absolute;
    left: 0; top: 9px;
    width: 14px; height: 14px;
    background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230c6cff' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center/contain no-repeat;
}

/* ========== 关于我们 ========== */
.about { background: var(--c-bg-soft); }
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 64px;
    align-items: center;
}
.about-visual {
    position: relative;
    aspect-ratio: 1 / 1;
    background: linear-gradient(135deg, #0c6cff 0%, #00c2a8 100%);
    border-radius: 28px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.about-visual::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 40px 40px;
}
.about-glow {
    position: absolute;
    width: 70%; height: 70%;
    background: radial-gradient(circle, rgba(255,255,255,0.25), transparent 70%);
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
}
.about-card-float {
    position: absolute;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    box-shadow: var(--shadow-lg);
    animation: floatCard 4s ease-in-out infinite;
}
.about-card-float strong { display: block; font-size: 15px; color: var(--c-text); }
.about-card-float span { font-size: 12px; color: var(--c-text-light); }
.about-card-float .af-icon {
    width: 42px; height: 42px;
    border-radius: 12px;
    display: grid; place-items: center;
}
.about-card-float .af-icon svg { width: 22px; height: 22px; }
.f1 { top: 16%; left: -6%; animation-delay: 0s; }
.f2 { bottom: 18%; right: -6%; animation-delay: 1.5s; }
@keyframes floatCard {
    0%,100% { transform: translateY(0); }
    50% { transform: translateY(-14px); }
}

.about-text p { color: var(--c-text-soft); margin-bottom: 16px; }
.about-features {
    margin-top: 28px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}
.af-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14.5px;
    font-weight: 500;
    color: var(--c-text);
}
.af-item svg {
    flex-shrink: 0;
    width: 22px; height: 22px;
    padding: 4px;
    background: rgba(0,194,168,0.1);
    color: #00a890;
    border-radius: 50%;
    box-sizing: content-box;
}

/* ========== 业务中心 ========== */
.centers { background: var(--c-bg); }
.centers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.center-card {
    position: relative;
    padding: 32px 24px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    text-align: center;
    transition: all .3s ease;
    overflow: hidden;
}
.center-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(12,108,255,0.04));
    opacity: 0;
    transition: opacity .3s ease;
}
.center-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.center-card:hover::after { opacity: 1; }
.city-mark {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--c-primary);
    background: rgba(12,108,255,0.08);
    padding: 4px 12px;
    border-radius: 50px;
    margin-bottom: 16px;
}
.center-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 6px; }
.center-tag { font-size: 13px; color: var(--c-text-light); margin-bottom: 20px; }
.center-phone {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 700;
    color: var(--c-primary);
    padding: 10px 18px;
    border-radius: 50px;
    background: rgba(12,108,255,0.06);
    transition: all .25s ease;
}
.center-phone svg { width: 16px; height: 16px; }
.center-phone:hover { background: var(--c-primary); color: #fff; }

/* ========== 联系我们 CTA ========== */
.contact {
    background: var(--c-bg-soft);
    padding-bottom: 120px;
}
.contact-box {
    background: linear-gradient(135deg, #0a1628 0%, #102a52 60%, #0c4a6e 100%);
    border-radius: 28px;
    padding: 60px;
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 48px;
    align-items: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.contact-box::before {
    content: '';
    position: absolute;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(0,194,168,0.25), transparent 70%);
    top: -150px; right: -100px;
    border-radius: 50%;
}
.contact-left { position: relative; z-index: 1; }
.contact-title {
    font-size: clamp(26px, 3vw, 36px);
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    line-height: 1.25;
}
.contact-desc {
    color: rgba(255,255,255,0.75);
    font-size: 15.5px;
    margin-bottom: 32px;
    max-width: 480px;
}
.contact-ways { display: flex; flex-direction: column; gap: 16px; }
.contact-way {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 22px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 16px;
    transition: all .25s ease;
    backdrop-filter: blur(8px);
}
.contact-way:hover { background: rgba(255,255,255,0.14); transform: translateX(4px); }
.cw-icon {
    width: 46px; height: 46px;
    flex-shrink: 0;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
    display: grid; place-items: center;
    color: #fff;
}
.cw-icon svg { width: 22px; height: 22px; }
.contact-way strong { display: block; font-size: 15px; color: #fff; }
.contact-way span { font-size: 13px; color: rgba(255,255,255,0.6); }

.contact-right { position: relative; z-index: 1; }
.qr-card {
    background: #fff;
    border-radius: 20px;
    padding: 32px 28px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}
.qr-visual {
    width: 150px; height: 150px;
    margin: 0 auto 18px;
    color: var(--c-text);
    padding: 8px;
    background: linear-gradient(135deg, rgba(12,108,255,0.05), rgba(0,194,168,0.05));
    border-radius: 14px;
}
.qr-text strong { display: block; font-size: 16px; color: var(--c-text); margin-bottom: 4px; }
.qr-text span { font-size: 13px; color: var(--c-text-light); }
.qr-btn {
    display: block;
    margin: 20px auto 0;
    padding: 11px 24px;
    background: linear-gradient(135deg, var(--c-primary), #3b8bff);
    color: #fff;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    width: fit-content;
    box-shadow: 0 6px 16px rgba(12,108,255,0.3);
    transition: all .25s ease;
}
.qr-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(12,108,255,0.4); }

/* ========== Footer ========== */
.footer {
    background: #0a1628;
    color: rgba(255,255,255,0.7);
    padding: 60px 0 28px;
}
.footer-main {
    display: grid;
    grid-template-columns: 1.4fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .logo-name { color: #fff; }
.footer-brand .logo-sub { color: rgba(255,255,255,0.5); }
.footer-brand .logo-icon { background: rgba(255,255,255,0.08); color: var(--c-accent); }
.footer-desc {
    margin-top: 20px;
    font-size: 14px;
    color: rgba(255,255,255,0.55);
    line-height: 1.8;
    max-width: 360px;
}
.footer-cols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.footer-col h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 18px;
}
.footer-col ul li { margin-bottom: 11px; }
.footer-col ul li a {
    font-size: 14px;
    color: rgba(255,255,255,0.55);
    transition: color .2s ease;
}
.footer-col ul li a:hover { color: var(--c-accent); }
.footer-bottom {
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}
.footer-bottom .icp { color: rgba(255,255,255,0.5); transition: color .2s; }
.footer-bottom .icp:hover { color: var(--c-accent); }

/* ========== 悬浮按钮 ========== */
.float-service {
    position: fixed;
    right: 28px;
    bottom: 28px;
    width: 58px; height: 58px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-primary), #3b8bff);
    color: #fff;
    display: grid;
    place-items: center;
    box-shadow: 0 10px 28px rgba(12,108,255,0.42);
    z-index: 900;
    transition: all .3s ease;
}
.float-service svg { width: 26px; height: 26px; }
.float-service::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2px solid var(--c-primary);
    animation: ringPulse 2s infinite;
}
@keyframes ringPulse {
    0% { transform: scale(1); opacity: .8; }
    100% { transform: scale(1.6); opacity: 0; }
}
.float-tip {
    position: absolute;
    right: 70px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--c-text);
    color: #fff;
    font-size: 13px;
    padding: 8px 14px;
    border-radius: 8px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s ease;
}
.float-tip::after {
    content: '';
    position: absolute;
    right: -5px; top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-left-color: var(--c-text);
}
.float-service:hover { transform: scale(1.08); }
.float-service:hover .float-tip { opacity: 1; }

.back-top {
    position: fixed;
    right: 28px;
    bottom: 100px;
    width: 46px; height: 46px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid var(--c-border);
    color: var(--c-text);
    cursor: pointer;
    display: grid;
    place-items: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all .3s ease;
    z-index: 900;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top svg { width: 22px; height: 22px; }
.back-top:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* ========== 滚动动画 ========== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .7s cubic-bezier(.2,.8,.2,1), transform .7s cubic-bezier(.2,.8,.2,1);
    transition-delay: calc(var(--i, 0) * 0.08s);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ========== 客户案例 ========== */
.cases { background: var(--c-bg-soft); }
.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}
.case-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all .35s cubic-bezier(.2,.8,.2,1);
    display: flex;
    flex-direction: column;
}
.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.case-cover {
    position: relative;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.case-cover::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px);
    background-size: 32px 32px;
}
.case-cover::after {
    content: '';
    position: absolute;
    width: 70%; height: 70%;
    background: radial-gradient(circle, rgba(255,255,255,0.25), transparent 70%);
    border-radius: 50%;
    top: 50%; left: 50%;
    transform: translate(-50%,-50%);
}
.cc-1 { background: linear-gradient(135deg, #1e6cff 0%, #00b8d4 100%); }
.cc-2 { background: linear-gradient(135deg, #6d28d9 0%, #ec4899 100%); }
.cc-3 { background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%); }
.cc-4 { background: linear-gradient(135deg, #0ea5e9 0%, #10b981 100%); }
.case-logo {
    position: relative;
    z-index: 1;
    width: 88px; height: 88px;
    border-radius: 22px;
    background: rgba(255,255,255,0.95);
    color: var(--c-text);
    font-size: 28px;
    font-weight: 800;
    display: grid;
    place-items: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.18);
    letter-spacing: 1px;
}
.case-cover-tag {
    position: absolute;
    bottom: 14px; left: 14px;
    z-index: 1;
    background: rgba(255,255,255,0.2);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 50px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.25);
}
.case-body { padding: 26px 28px 28px; display: flex; flex-direction: column; flex: 1; }
.case-meta { display: flex; gap: 8px; margin-bottom: 12px; }
.case-meta span {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .5px;
    padding: 3px 10px;
    border-radius: 50px;
}
.case-industry { background: rgba(12,108,255,0.08); color: var(--c-primary); }
.case-region { background: rgba(0,194,168,0.1); color: #00a890; }
.case-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; line-height: 1.4; }
.case-body p { font-size: 14px; color: var(--c-text-soft); margin-bottom: 16px; flex: 1; }
.case-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.case-tags span {
    font-size: 12px;
    color: var(--c-text-soft);
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    padding: 4px 10px;
    border-radius: 6px;
}
.cases-cta {
    margin-top: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    font-size: 16px;
    color: var(--c-text);
    font-weight: 500;
}

/* ========== 新闻资讯 ========== */
.news { background: var(--c-bg); }
.news-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 36px;
    align-items: stretch;
}
.news-feature {
    background: linear-gradient(135deg, #0a1628 0%, #102a52 60%, #0c4a6e 100%);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: var(--shadow-md);
    transition: transform .35s ease, box-shadow .35s ease;
}
.news-feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.news-feature-cover {
    position: relative;
    height: 220px;
    background:
        radial-gradient(circle at 20% 30%, rgba(12,108,255,0.4), transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0,194,168,0.35), transparent 55%),
        linear-gradient(135deg, #0c4a6e, #102a52);
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    padding: 20px 24px;
}
.news-feature-cover::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
    background-size: 32px 32px;
}
.news-cat {
    position: relative;
    z-index: 1;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #fff;
    background: rgba(255,255,255,0.18);
    border: 1px solid rgba(255,255,255,0.3);
    padding: 5px 12px;
    border-radius: 50px;
    backdrop-filter: blur(8px);
}
.news-cat.sm {
    display: inline-block;
    margin-bottom: 8px;
    background: rgba(12,108,255,0.08);
    color: var(--c-primary);
    border: 1px solid rgba(12,108,255,0.15);
    padding: 3px 10px;
    font-size: 11px;
}
.news-date {
    position: relative;
    z-index: 1;
    color: rgba(255,255,255,0.85);
    font-size: 13px;
    font-weight: 500;
}
.news-feature-body { padding: 28px 30px 32px; color: #fff; flex: 1; display: flex; flex-direction: column; }
.news-feature-body h3 {
    font-size: 22px;
    line-height: 1.4;
    margin-bottom: 14px;
    color: #fff;
}
.news-feature-body p { color: rgba(255,255,255,0.7); font-size: 14.5px; margin-bottom: 20px; flex: 1; }
.news-more {
    display: inline-flex;
    align-items: center;
    color: var(--c-accent);
    font-size: 14px;
    font-weight: 600;
    width: fit-content;
    transition: gap .2s ease;
}
.news-more:hover { gap: 6px; }

.news-list { display: flex; flex-direction: column; gap: 14px; }
.news-item {
    display: grid;
    grid-template-columns: 72px 1fr;
    gap: 18px;
    padding: 20px 22px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    transition: all .25s ease;
    cursor: pointer;
}
.news-item:hover {
    transform: translateX(4px);
    border-color: rgba(12,108,255,0.3);
    box-shadow: var(--shadow-sm);
}
.news-date-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-right: 1px solid var(--c-border);
    padding-right: 16px;
}
.ni-day {
    font-size: 30px;
    font-weight: 800;
    line-height: 1;
    color: var(--c-primary);
}
.ni-month { font-size: 11px; color: var(--c-text-light); margin-top: 4px; letter-spacing: .5px; }
.news-content h4 {
    font-size: 15.5px;
    font-weight: 600;
    line-height: 1.45;
    margin-bottom: 6px;
    color: var(--c-text);
    transition: color .2s ease;
}
.news-item:hover .news-content h4 { color: var(--c-primary); }
.news-content p { font-size: 13px; color: var(--c-text-soft); line-height: 1.6; }

/* ========== 常见问题 FAQ ========== */
.faq { background: var(--c-bg-soft); }
.faq-container { max-width: 880px; }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: all .25s ease;
}
.faq-item.active {
    border-color: rgba(12,108,255,0.3);
    box-shadow: 0 6px 20px rgba(12,108,255,0.08);
}
.faq-q {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--c-text);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    transition: color .2s ease;
    font-family: inherit;
}
.faq-q:hover { color: var(--c-primary); }
.faq-q span:first-child { flex: 1; }
.faq-icon {
    position: relative;
    width: 24px; height: 24px;
    flex-shrink: 0;
    border: 1.5px solid var(--c-border);
    border-radius: 50%;
    transition: all .3s ease;
}
.faq-icon::before, .faq-icon::after {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%,-50%);
    background: var(--c-text-soft);
    transition: all .3s ease;
}
.faq-icon::before { width: 10px; height: 2px; }
.faq-icon::after { width: 2px; height: 10px; }
.faq-item.active .faq-icon { background: var(--c-primary); border-color: var(--c-primary); }
.faq-item.active .faq-icon::before, .faq-item.active .faq-icon::after { background: #fff; }
.faq-item.active .faq-icon::after { transform: translate(-50%,-50%) rotate(90deg); opacity: 0; }
.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
}
.faq-a p {
    padding: 0 24px 22px;
    font-size: 14.5px;
    color: var(--c-text-soft);
    line-height: 1.85;
}

/* ========== 响应式 ========== */
/* ========== 子页面通用：页头 ========== */
.page-hero {
    position: relative;
    padding: calc(var(--header-h) + 60px) 0 60px;
    background: linear-gradient(180deg, #f3f7ff 0%, #ffffff 100%);
    overflow: hidden;
    text-align: center;
}
.page-hero::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(12,108,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(12,108,255,0.04) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 80%);
}
.page-hero-content { position: relative; z-index: 1; max-width: 760px; margin: 0 auto; }
.breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--c-text-light);
    margin-bottom: 20px;
    padding: 6px 16px;
    background: rgba(255,255,255,0.7);
    border-radius: 50px;
    border: 1px solid var(--c-border);
}
.breadcrumb a { color: var(--c-text-soft); transition: color .2s; }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb span.sep { color: var(--c-text-light); }
.page-hero h1 {
    font-size: clamp(30px, 4.5vw, 46px);
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}
.page-hero p { font-size: 16px; color: var(--c-text-soft); max-width: 620px; margin: 0 auto; }

.section-link-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 36px;
    color: var(--c-primary);
    font-size: 15px;
    font-weight: 600;
    transition: gap .2s ease;
}
.section-link-more:hover { gap: 10px; }
.section-link-more svg { width: 16px; height: 16px; }
.section-head-with-link {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 50px;
    max-width: none;
}
.section-head-with-link .section-head { text-align: left; margin-bottom: 0; }
@media (max-width: 768px) {
    .section-head-with-link { flex-direction: column; align-items: flex-start; }
}

/* 案例详情页 */
.case-detail-list { display: flex; flex-direction: column; gap: 32px; }
.case-detail {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 36px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all .3s ease;
}
.case-detail:hover { box-shadow: var(--shadow-lg); border-color: transparent; }
.case-detail-cover {
    position: relative;
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.case-detail-body { padding: 32px 36px 32px 0; }
.case-detail-body .case-meta { margin-bottom: 14px; }
.case-detail-body h3 { font-size: 22px; font-weight: 700; margin-bottom: 14px; line-height: 1.4; }
.case-detail-body p { font-size: 15px; color: var(--c-text-soft); margin-bottom: 16px; line-height: 1.8; }
.case-result { display: flex; gap: 28px; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--c-border); flex-wrap: wrap; }
.case-result-item .num {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(120deg, var(--c-primary), var(--c-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.case-result-item .lbl { font-size: 13px; color: var(--c-text-light); margin-top: 2px; }

/* 新闻详情页 */
.news-page-grid { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
.news-page-list { display: flex; flex-direction: column; gap: 16px; }
.news-page-item {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 20px;
    padding: 24px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    transition: all .25s ease;
    cursor: pointer;
}
.news-page-item:hover { transform: translateX(4px); border-color: rgba(12,108,255,0.3); box-shadow: var(--shadow-md); }
.news-sidebar { position: sticky; top: calc(var(--header-h) + 30px); }
.news-sidebar-box {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}
.news-sidebar-box h4 { font-size: 16px; font-weight: 700; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--c-border); }
.news-sidebar-box ul li { padding: 8px 0; font-size: 14px; }
.news-sidebar-box ul li a { color: var(--c-text-soft); transition: color .2s; }
.news-sidebar-box ul li a:hover { color: var(--c-primary); }
.news-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.news-tags a {
    font-size: 13px;
    padding: 6px 12px;
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: 50px;
    color: var(--c-text-soft);
    transition: all .2s;
}
.news-tags a:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* 业务详情页 */
.service-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    margin-bottom: 80px;
    padding-bottom: 80px;
    border-bottom: 1px solid var(--c-border);
}
.service-detail:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.service-detail.reverse { direction: rtl; }
.service-detail.reverse > * { direction: ltr; }
.service-detail-text .service-num {
    font-size: 14px;
    font-weight: 700;
    color: var(--c-primary);
    letter-spacing: 2px;
    margin-bottom: 12px;
}
.service-detail-text h3 { font-size: 28px; font-weight: 800; margin-bottom: 18px; line-height: 1.3; }
.service-detail-text > p { font-size: 15px; color: var(--c-text-soft); margin-bottom: 22px; line-height: 1.85; }
.service-detail-features { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.sd-feature {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: var(--c-text);
}
.sd-feature svg { flex-shrink: 0; width: 20px; height: 20px; color: var(--c-accent); margin-top: 2px; }
.service-detail-visual {
    aspect-ratio: 4 / 3;
    border-radius: var(--radius);
    display: grid;
    place-items: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.service-detail-visual::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px);
    background-size: 36px 36px;
}
.service-detail-visual svg { width: 80px; height: 80px; color: #fff; position: relative; z-index: 1; opacity: 0.95; }

/* 联系页 */
.contact-page-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; }
.contact-form { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 36px; }
.contact-form h3 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.contact-form .form-sub { color: var(--c-text-soft); font-size: 14px; margin-bottom: 24px; }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--c-text); }
.form-row label .req { color: #ef4444; }
.form-row input, .form-row textarea, .form-row select {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--c-border);
    border-radius: 10px;
    font-size: 14px;
    font-family: inherit;
    color: var(--c-text);
    background: var(--c-bg-soft);
    transition: all .2s ease;
}
.form-row input:focus, .form-row textarea:focus, .form-row select:focus {
    outline: none;
    border-color: var(--c-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(12,108,255,0.1);
}
.form-row textarea { resize: vertical; min-height: 110px; }
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-submit {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--c-primary), #3b8bff);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all .25s ease;
    box-shadow: 0 8px 20px rgba(12,108,255,0.3);
}
.form-submit:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(12,108,255,0.4); }
.contact-info-list { display: flex; flex-direction: column; gap: 16px; }
.contact-info-item {
    display: flex;
    gap: 16px;
    padding: 22px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    transition: all .25s ease;
}
.contact-info-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.ci-icon {
    width: 48px; height: 48px;
    flex-shrink: 0;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(12,108,255,0.1), rgba(0,194,168,0.1));
    color: var(--c-primary);
    display: grid; place-items: center;
}
.ci-icon svg { width: 24px; height: 24px; }
.contact-info-item h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.contact-info-item p { font-size: 14px; color: var(--c-text-soft); }
.contact-info-item a { color: var(--c-primary); font-weight: 600; }

/* 关于页 */
.about-section-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 50px; }
.about-value-card {
    padding: 32px 28px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    transition: all .3s ease;
}
.about-value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.about-value-card .av-icon {
    width: 54px; height: 54px;
    border-radius: 14px;
    display: grid; place-items: center;
    margin-bottom: 18px;
}
.about-value-card .av-icon svg { width: 28px; height: 28px; }
.about-value-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.about-value-card p { font-size: 14px; color: var(--c-text-soft); line-height: 1.8; }
.about-timeline { margin-top: 60px; }
.timeline-list { display: flex; flex-direction: column; gap: 0; }
.timeline-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 32px;
    padding: 24px 0;
    border-left: 2px solid var(--c-border);
    padding-left: 32px;
    position: relative;
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: -7px; top: 32px;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--c-primary);
    box-shadow: 0 0 0 4px rgba(12,108,255,0.15);
}
.timeline-year { font-size: 22px; font-weight: 800; color: var(--c-primary); }
.timeline-content h4 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.timeline-content p { font-size: 14px; color: var(--c-text-soft); }

@media (max-width: 980px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .centers-grid { grid-template-columns: repeat(2, 1fr); }
    .cases-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-visual { max-width: 460px; margin: 0 auto; }
    .contact-box { grid-template-columns: 1fr; padding: 44px 32px; gap: 36px; }
    .footer-main { grid-template-columns: 1fr; gap: 40px; }
    .case-detail { grid-template-columns: 1fr; }
    .case-detail-cover { min-height: 180px; }
    .case-detail-body { padding: 28px; }
    .news-page-grid { grid-template-columns: 1fr; }
    .news-sidebar { position: static; }
    .service-detail { grid-template-columns: 1fr; gap: 30px; }
    .service-detail.reverse { direction: ltr; }
    .contact-page-grid { grid-template-columns: 1fr; }
    .about-section-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: var(--header-h);
        left: 0; right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 16px;
        gap: 4px;
        border-bottom: 1px solid var(--c-border);
        box-shadow: var(--shadow-md);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: all .3s ease;
    }
    .nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
    .nav-link { padding: 12px 16px; }
    .nav-link.active::after { display: none; }
    .nav-cta { margin: 8px 0 0; text-align: center; }
    .menu-toggle { display: flex; }

    .section { padding: 70px 0; }
    .hero { padding: calc(var(--header-h) + 50px) 0 60px; }
    .hero-stats { gap: 32px; }
    .stat-num { font-size: 32px; }

    .services-grid { grid-template-columns: 1fr; }
    .centers-grid { grid-template-columns: 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .news-item { grid-template-columns: 60px 1fr; gap: 14px; padding: 16px 18px; }
    .ni-day { font-size: 24px; }
    .about-features { grid-template-columns: 1fr; }
    .footer-cols { grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .contact-box { padding: 36px 22px; }
    .faq-q { padding: 18px 18px; font-size: 15px; }
    .faq-a p { padding: 0 18px 18px; font-size: 14px; }
    .float-service { right: 18px; bottom: 18px; width: 52px; height: 52px; }
    .back-top { right: 18px; bottom: 88px; }
}

@media (max-width: 480px) {
    .container { padding: 0 18px; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .btn { justify-content: center; }
    .hero-stats { gap: 24px; }
    .footer-cols { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
}