/* ============================================
   准灵科技 官网样式
   配色：科技蓝 + 蓝紫渐变 / 浅色内容 + 深色 Hero
   ============================================ */

:root {
    --ink: #0E1B3D;
    --ink-2: #16294F;
    --primary: #3A6DF0;
    --primary-d: #2B5BD6;
    --grad-start: #4F8DFF;
    --grad-end: #7B5CFF;
    --grad: linear-gradient(135deg, #4F8DFF 0%, #7B5CFF 100%);
    --text: #1A2238;
    --muted: #6A7488;
    --muted-2: #9AA3B5;
    --bg: #f7f9fc;
    --bg-alt: #eef3fb;
    --card: #ffffff;
    --border: #E6ECF5;
    --border-2: #EEF2F8;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow-sm: 0 2px 12px rgba(20,40,90,.06);
    --shadow: 0 10px 36px rgba(20,40,90,.10);
    --shadow-lg: 0 24px 64px rgba(20,40,90,.16);
    --container: 1200px;
    --ease: cubic-bezier(.22,.61,.36,1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

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

.hide-sm { display: inline; }

/* ---------- 通用按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all .28s var(--ease);
    white-space: nowrap;
}
.btn-lg { padding: 15px 34px; font-size: 16px; }
.btn-block { width: 100%; }
.btn-primary {
    background: var(--grad);
    color: #fff;
    box-shadow: 0 8px 24px rgba(79,141,255,.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(79,141,255,.42); }
.btn-ghost {
    background: rgba(255,255,255,.08);
    color: #fff;
    border: 1.5px solid rgba(255,255,255,.4);
    backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: rgba(255,255,255,.16); border-color: rgba(255,255,255,.7); }
.btn-light {
    background: #fff;
    color: var(--ink);
    box-shadow: var(--shadow);
}
.btn-light:hover { transform: translateY(-2px); }

/* ---------- 导航 ---------- */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(14,27,61,.0);
    transition: all .35s var(--ease);
}
.navbar.scrolled {
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(14px);
    box-shadow: 0 4px 24px rgba(20,40,90,.08);
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 21px;
    color: #fff;
    transition: color .3s;
}
.navbar.scrolled .logo { color: var(--ink); }
.logo-mark { flex-shrink: 0; }
.logo-text span { font-weight: 400; opacity: .85; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-link {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: rgba(255,255,255,.82);
    border-radius: 8px;
    transition: all .25s;
    position: relative;
}
.nav-link:hover, .nav-link.active { color: #fff; }
.nav-link:not(.nav-cta)::after {
    content: "";
    position: absolute;
    left: 16px; right: 16px; bottom: 2px;
    height: 2px;
    background: var(--grad);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .3s var(--ease);
    border-radius: 2px;
}
.nav-link:hover:not(.nav-cta)::after,
.nav-link.active:not(.nav-cta)::after { transform: scaleX(1); }

.navbar.scrolled .nav-link { color: var(--text); }
.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active { color: var(--primary); }

.nav-cta { margin-left: 10px; color: #fff !important; }
.nav-cta::after { display: none !important; }
.navbar.scrolled .nav-cta { color: #fff !important; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}
.nav-toggle span {
    width: 24px; height: 2.5px;
    background: #fff;
    border-radius: 2px;
    transition: all .3s;
}
.navbar.scrolled .nav-toggle span { background: var(--ink); }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 60px;
    background: radial-gradient(120% 100% at 20% 0%, #1a2f63 0%, #0E1B3D 55%, #070d22 100%);
    overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(70px);
    opacity: .55;
    animation: float 14s ease-in-out infinite;
}
.orb-1 {
    width: 480px; height: 480px;
    background: radial-gradient(circle, #4F8DFF, transparent 65%);
    top: -80px; left: -60px;
}
.orb-2 {
    width: 520px; height: 520px;
    background: radial-gradient(circle, #7B5CFF, transparent 65%);
    bottom: -120px; right: -80px;
    animation-delay: -6s;
}
@keyframes float {
    0%,100% { transform: translate(0,0); }
    50% { transform: translate(30px,-30px); }
}
.grid-overlay {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
}
.hero-inner { position: relative; z-index: 2; text-align: center; }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 18px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.18);
    border-radius: 999px;
    font-size: 13.5px;
    color: rgba(255,255,255,.9);
    margin-bottom: 28px;
    backdrop-filter: blur(6px);
}
.hero-badge .dot {
    width: 8px; height: 8px;
    background: #4ade80;
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(74,222,128,.25);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%,100% { box-shadow: 0 0 0 4px rgba(74,222,128,.25); }
    50% { box-shadow: 0 0 0 8px rgba(74,222,128,.1); }
}
.hero-title {
    font-size: clamp(38px, 7vw, 76px);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -.02em;
    color: #fff;
    margin-bottom: 26px;
}
.grad-text {
    background: linear-gradient(120deg, #6FB0FF, #B6A6FF, #6FB0FF);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shine 5s linear infinite;
}
@keyframes shine { to { background-position: 200% center; } }
.hero-subtitle {
    font-size: clamp(15px, 2vw, 18px);
    color: rgba(255,255,255,.72);
    max-width: 760px;
    margin: 0 auto 40px;
    line-height: 1.8;
}
.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 70px;
}
.hero-stats {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 880px;
    margin: 0 auto;
}
.hero-stat {
    flex: 1;
    min-width: 150px;
    padding: 22px 12px;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-sm);
    backdrop-filter: blur(8px);
    transition: all .3s;
}
.hero-stat:hover { background: rgba(255,255,255,.09); transform: translateY(-3px); }
.hero-stat strong {
    display: block;
    font-size: 34px;
    font-weight: 800;
    color: #fff;
    line-height: 1;
    margin-bottom: 6px;
}
.hero-stat strong span { color: var(--grad-start); }
.hero-stat > span { font-size: 13.5px; color: rgba(255,255,255,.65); }
.hero-brand-name {
    margin-top: 30px;
    font-size: 13px;
    color: rgba(255,255,255,.28);
    text-align: center;
    letter-spacing: .02em;
}

.hero-wave {
    position: absolute;
    bottom: -1px; left: 0; right: 0;
    line-height: 0;
    z-index: 1;
}
.hero-wave svg { width: 100%; height: 80px; display: block; }

/* ---------- 通用 Section ---------- */
.section { padding: 96px 0; position: relative; }
.section-alt { background: var(--bg-alt); }
.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 60px;
}
.eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .14em;
    color: var(--primary);
    margin-bottom: 14px;
}
.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    letter-spacing: -.01em;
    margin-bottom: 14px;
    color: var(--ink);
}
.section-desc { font-size: 16.5px; color: var(--muted); }

/* ---------- 关于我们 ---------- */
.about-grid {
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: 56px;
    align-items: center;
}
.about-text h3 {
    font-size: 26px;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 20px;
}
.about-text p {
    color: var(--muted);
    font-size: 16px;
    margin-bottom: 16px;
    line-height: 1.85;
}
.about-text strong { color: var(--primary); }
.about-points { margin-top: 26px; display: grid; gap: 14px; }
.about-points li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 15.5px;
    color: #3a4258;
}
.check {
    flex-shrink: 0;
    width: 22px; height: 22px;
    background: var(--grad);
    color: #fff;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    margin-top: 2px;
}
.about-visual { display: flex; justify-content: center; }
.about-card {
    width: 100%;
    max-width: 420px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 30px;
    position: relative;
    overflow: hidden;
}
.about-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 5px;
    background: var(--grad);
}
.about-card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.ac-tag {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(58,109,240,.1);
    padding: 4px 12px;
    border-radius: 6px;
}
.ac-status { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 6px; }
.live-dot {
    width: 8px; height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse2 2s infinite;
}
@keyframes pulse2 {
    0%,100% { box-shadow: 0 0 0 0 rgba(34,197,94,.5); }
    50% { box-shadow: 0 0 0 6px rgba(34,197,94,0); }
}
.about-list { display: grid; gap: 16px; margin-bottom: 26px; }
.about-list > div {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 16px;
    border-bottom: 1px dashed var(--border-2);
}
.about-list > div:last-child { border-bottom: none; padding-bottom: 0; }
.about-list dt { font-size: 14px; color: var(--muted); flex-shrink: 0; }
.about-list dd { font-size: 14.5px; color: var(--text); font-weight: 600; text-align: right; }
.about-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.about-tags span {
    font-size: 12.5px;
    padding: 5px 12px;
    background: var(--bg-alt);
    color: var(--ink-2);
    border-radius: 6px;
    font-weight: 600;
}

/* ---------- 核心服务 ---------- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.service-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 30px;
    transition: all .35s var(--ease);
    position: relative;
    overflow: hidden;
}
.service-card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: var(--radius);
    padding: 2px;
    background: var(--grad);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity .35s;
}
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.service-card:hover::after { opacity: 1; }
.service-icon {
    width: 60px; height: 60px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(79,141,255,.12), rgba(123,92,255,.12));
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
    transition: all .35s;
}
.service-card:hover .service-icon {
    background: var(--grad);
    color: #fff;
    transform: scale(1.06) rotate(-4deg);
}
.service-card h3 { font-size: 21px; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
.service-card p { font-size: 15px; color: var(--muted); line-height: 1.75; margin-bottom: 20px; }
.service-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.service-tags li {
    font-size: 12.5px;
    padding: 4px 11px;
    background: var(--bg-alt);
    color: var(--ink-2);
    border-radius: 6px;
    font-weight: 600;
}

/* ---------- 工作流程 ---------- */
.process-track {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    position: relative;
}
.process-line {
    position: absolute;
    top: 42px; left: 10%; right: 10%;
    height: 3px;
    background: linear-gradient(90deg, var(--grad-start), var(--grad-end), transparent);
    border-radius: 3px;
}
.process-step {
    text-align: center;
    position: relative;
    z-index: 2;
}
.ps-num {
    width: 86px; height: 86px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--card);
    border: 3px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    font-weight: 800;
    color: var(--primary);
    box-shadow: var(--shadow-sm);
    transition: all .35s var(--ease);
}
.process-step:hover .ps-num {
    background: var(--grad);
    color: #fff;
    border-color: transparent;
    transform: scale(1.08);
}
.process-step h4 { font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.process-step p { font-size: 14px; color: var(--muted); line-height: 1.7; padding: 0 6px; }

/* ---------- 技术优势 ---------- */
.adv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.adv-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 34px 30px;
    transition: all .3s var(--ease);
}
.adv-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: transparent; }
.adv-icon {
    width: 52px; height: 52px;
    border-radius: 12px;
    background: var(--grad);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}
.adv-card h3 { font-size: 19px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.adv-card p { font-size: 14.5px; color: var(--muted); line-height: 1.75; }

/* ---------- 项目案例 ---------- */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}
.case-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all .35s var(--ease);
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-visual {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.cv-1 { background: linear-gradient(135deg, #1e3a6e, #2b5bb5); }
.cv-2 { background: linear-gradient(135deg, #6b3fa0, #b06bcf); }
.cv-3 { background: linear-gradient(135deg, #0f766e, #14b8a6); }
.cv-4 { background: linear-gradient(135deg, #b45309, #f59e0b); }
.cv-tag {
    position: absolute;
    top: 14px; right: 14px;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    background: rgba(255,255,255,.2);
    padding: 4px 12px;
    border-radius: 6px;
    backdrop-filter: blur(6px);
}
.cv-mock { width: 78%; height: 70%; display: flex; flex-direction: column; gap: 8px; }
/* dashboard mock */
.cv-mock-dashboard .cv-bar { height: 10px; background: rgba(255,255,255,.5); border-radius: 4px; width: 60%; }
.cv-mock-dashboard .cv-bar.short { width: 35%; opacity: .6; }
.cv-mock-dashboard .cv-chart { flex: 1; display: flex; align-items: flex-end; gap: 6px; margin-top: 4px; }
.cv-mock-dashboard .cv-chart span { flex: 1; background: rgba(255,255,255,.65); border-radius: 4px 4px 0 0; }
/* ecom mock */
.cv-mock-ecom { flex-direction: row; flex-wrap: wrap; gap: 6px; }
.cv-mock-ecom .cv-product { width: 30%; aspect-ratio: 1; background: rgba(255,255,255,.4); border-radius: 6px; }
.cv-mock-ecom .cv-btn { height: 12px; background: rgba(255,255,255,.6); border-radius: 4px; width: 70%; margin-top: 4px; }
/* mini mock */
.cv-mock-mini { flex-direction: row; gap: 10px; align-items: center; justify-content: center; }
.cv-mock-mini .cv-screen { width: 50px; height: 90px; background: rgba(255,255,255,.5); border-radius: 8px; border: 2px solid rgba(255,255,255,.7); }
.cv-mock-mini .cv-screen.short { height: 70px; opacity: .6; }
/* saas mock */
.cv-mock-saas { gap: 7px; justify-content: center; }
.cv-mock-saas .cv-grid-row { height: 14px; background: rgba(255,255,255,.45); border-radius: 4px; }
.cv-mock-saas .cv-grid-row:nth-child(2) { width: 85%; opacity: .8; }
.cv-mock-saas .cv-grid-row:nth-child(3) { width: 65%; opacity: .6; }

.case-body { padding: 26px 28px 30px; }
.case-body h3 { font-size: 20px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.case-body p { font-size: 14.5px; color: var(--muted); line-height: 1.75; margin-bottom: 18px; }
.case-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.case-meta span {
    font-size: 12px;
    padding: 4px 11px;
    background: var(--bg-alt);
    color: var(--ink-2);
    border-radius: 6px;
    font-weight: 600;
}
.cases-note { text-align: center; font-size: 13.5px; color: var(--muted-2); margin-top: 36px; }

/* ---------- CTA 横幅 ---------- */
.cta-band {
    background: linear-gradient(120deg, #142a5c, #2b1a6e 60%, #3a1f5c);
    position: relative;
    overflow: hidden;
}
.cta-band::before, .cta-band::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: .5;
}
.cta-band::before { width: 300px; height: 300px; background: #4F8DFF; top: -120px; left: -40px; }
.cta-band::after { width: 300px; height: 300px; background: #7B5CFF; bottom: -120px; right: -40px; }
.cta-inner {
    position: relative; z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    padding: 60px 24px;
    flex-wrap: wrap;
}
.cta-text h2 { font-size: clamp(24px, 3.5vw, 34px); font-weight: 800; color: #fff; margin-bottom: 8px; }
.cta-text p { font-size: 16px; color: rgba(255,255,255,.78); }

/* ---------- 联系我们 ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: .85fr 1.15fr;
    gap: 48px;
    align-items: start;
}
.contact-info { display: grid; gap: 20px; }
.ci-item {
    display: flex;
    gap: 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 22px 24px;
    transition: all .3s;
}
.ci-item:hover { box-shadow: var(--shadow-sm); transform: translateX(4px); }
.ci-icon {
    flex-shrink: 0;
    width: 46px; height: 46px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(79,141,255,.12), rgba(123,92,255,.12));
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
}
.ci-item h4 { font-size: 15px; font-weight: 700; color: var(--ink); margin-bottom: 3px; }
.ci-item p { font-size: 14.5px; color: var(--muted); }

/* ---------- 企业微信二维码 ---------- */
.contact-qywx { display: flex; justify-content: center; }
.qywx-card {
    width: 100%;
    max-width: 380px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 34px 36px 30px;
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.qywx-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 5px;
    background: linear-gradient(90deg, #4F8DFF, #7B5CFF);
}
.qywx-card h3 { font-size: 24px; font-weight: 800; color: var(--ink); margin-bottom: 6px; }
.qywx-hint { font-size: 14.5px; color: var(--muted); margin-bottom: 24px; }
.qywx-img-wrap {
    padding: 14px;
    background: #fff;
    border: 1px solid var(--border-2);
    border-radius: var(--radius-sm);
    display: inline-block;
    margin-bottom: 18px;
}
.qywx-img-wrap img {
    width: 240px; height: 240px;
    border-radius: 10px;
    object-fit: cover;
    display: block;
}
.qywx-name {
    font-size: 13.5px;
    color: var(--muted);
    font-weight: 500;
}
.copy-text { font-weight: 700; color: var(--primary); letter-spacing: .04em; }

/* ---------- 页脚 ---------- */
.footer {
    background: var(--ink);
    color: rgba(255,255,255,.7);
    padding: 64px 0 0;
}
.footer-inner {
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: 48px;
    padding-bottom: 48px;
}
.footer-brand .logo { color: #fff; margin-bottom: 18px; }
.footer-brand p { font-size: 14.5px; line-height: 1.8; color: rgba(255,255,255,.55); max-width: 320px; }
.footer-cols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.footer-col h5 {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}
.footer-col a {
    display: block;
    font-size: 14px;
    color: rgba(255,255,255,.55);
    padding: 5px 0;
    transition: color .25s;
}
.footer-col a:hover { color: #6FB0FF; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.08);
    padding: 22px 0;
}
.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.footer-bottom p { font-size: 13.5px; color: rgba(255,255,255,.45); }
.footer-icp { color: rgba(255,255,255,.3) !important; }

/* ---------- 回到顶部 ---------- */
.back-top {
    position: fixed;
    right: 28px; bottom: 28px;
    width: 48px; height: 48px;
    border-radius: 50%;
    background: var(--grad);
    color: #fff;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: all .35s var(--ease);
}
.back-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-top:hover { transform: translateY(-4px); }

/* ---------- 滚动揭示动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in { opacity: 1; transform: translateY(0); }
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .services-grid, .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .process-track { grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-visual { order: -1; }
    .contact-grid { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 768px) {
    .hide-sm { display: none; }
    .nav-toggle { display: flex; }
    .nav-links {
        position: fixed;
        top: 0; right: 0;
        width: 80%; max-width: 320px;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: 90px 28px 40px;
        gap: 8px;
        box-shadow: -10px 0 40px rgba(0,0,0,.15);
        transform: translateX(100%);
        transition: transform .35s var(--ease);
        z-index: 99;
    }
    .nav-links.open { transform: translateX(0); }
    .nav-links .nav-link { color: var(--text) !important; width: 100%; padding: 12px 16px; }
    .nav-links .nav-link::after { display: none; }
    .nav-cta { margin: 12px 0 0; width: 100%; }
    .navbar.scrolled .nav-toggle span:nth-child(1),
    .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle.open span:nth-child(2) { opacity: 0; }
    .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    .hero { padding: 110px 0 50px; min-height: auto; }
    .hero-actions { margin-bottom: 48px; }
    .hero-actions .btn { flex: 1; }
    .hero-stat { min-width: calc(50% - 6px); }

    .section { padding: 70px 0; }
    .section-head { margin-bottom: 44px; }
    .services-grid, .adv-grid { grid-template-columns: 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .process-track { grid-template-columns: 1fr 1fr; gap: 24px; }
    .process-line { display: none; }
    .form-row { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 36px; }
    .footer-cols { grid-template-columns: 1fr 1fr; }
    .cta-inner { flex-direction: column; text-align: center; }
    .contact-form { padding: 26px 22px; }
    .container { padding: 0 20px; }
}

@media (max-width: 420px) {
    .hero-stat { min-width: 100%; }
    .process-track { grid-template-columns: 1fr; }
    .footer-cols { grid-template-columns: 1fr; }
}