/* ============================================
   成都纳帆科技有限公司 · 官网样式
   主色 #1E88E5（品牌蓝），辅色 #0D47A1（深蓝）
   ============================================ */

:root {
    --primary: #1E88E5;
    --primary-dark: #0D47A1;
    --primary-light: #64B5F6;
    --accent: #26C6DA;
    --bg: #0a1929;
    --bg-2: #0f2540;
    --bg-3: #14304f;
    --surface: rgba(255,255,255,0.04);
    --surface-2: rgba(255,255,255,0.07);
    --border: rgba(255,255,255,0.10);
    --text: #e8f1fb;
    --text-dim: #9bb1c8;
    --text-mute: #6a7e95;
    --grad-blue: linear-gradient(135deg, #1E88E5 0%, #0D47A1 100%);
    --grad-teal: linear-gradient(135deg, #26C6DA 0%, #00838F 100%);
    --grad-purple: linear-gradient(135deg, #7E57C2 0%, #4527A0 100%);
    --shadow: 0 10px 40px rgba(0,0,0,0.35);
    --shadow-blue: 0 8px 30px rgba(30,136,229,0.30);
    --r-sm: 8px;
    --r-md: 14px;
    --r-lg: 22px;
    --maxw: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
                 "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 15px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-light); }
img, svg { display: block; max-width: 100%; }

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

.section { padding: 110px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, transparent 0%, rgba(30,136,229,0.04) 100%); }

.section-head {
    max-width: 720px;
    margin: 0 auto 60px;
    text-align: center;
}
.kicker {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: 14px;
    padding: 4px 12px;
    border: 1px solid rgba(30,136,229,0.30);
    border-radius: 100px;
    background: rgba(30,136,229,0.08);
}
.section-head h2 {
    font-size: 38px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 16px;
    background: linear-gradient(180deg, #ffffff 0%, #b8d4f0 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.section-head p {
    color: var(--text-dim);
    font-size: 16px;
}

/* ================== 导航 ================== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 14px 0;
    background: rgba(10,25,41,0.65);
    backdrop-filter: blur(18px) saturate(180%);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    border-bottom: 1px solid transparent;
    transition: all .3s;
}
.navbar.scrolled {
    background: rgba(10,25,41,0.92);
    border-bottom-color: var(--border);
    padding: 10px 0;
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}
.brand-logo { width: 38px; height: 38px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-weight: 700; font-size: 17px; color: #fff; letter-spacing: 0.5px; }
.brand-sub { font-size: 10px; color: var(--text-mute); letter-spacing: 2px; margin-top: 2px; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-links a {
    padding: 8px 14px;
    font-size: 14px;
    color: var(--text-dim);
    border-radius: 6px;
    transition: all .2s;
    position: relative;
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.05); }
.nav-links a.active { color: var(--primary-light); }
.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%; transform: translateX(-50%);
    width: 18px; height: 2px; background: var(--primary); border-radius: 2px;
}
.nav-cta {
    margin-left: 8px;
    background: var(--grad-blue);
    color: #fff !important;
    padding: 8px 18px !important;
    border-radius: 100px !important;
    box-shadow: var(--shadow-blue);
}
.nav-cta:hover { transform: translateY(-1px); }

.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    width: 40px;
    height: 40px;
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}
.nav-toggle span {
    width: 22px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all .3s;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ================== Hero ================== */
.hero {
    position: relative;
    min-height: 100vh;
    padding: 140px 0 80px;
    display: flex;
    align-items: center;
    overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(30,136,229,0.25) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(38,198,218,0.18) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(126,87,194,0.10) 0%, transparent 60%),
        var(--bg);
}
.hero-grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}
.hero-inner {
    position: relative;
    z-index: 2;
    text-align: center;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(30,136,229,0.12);
    border: 1px solid rgba(30,136,229,0.30);
    border-radius: 100px;
    font-size: 13px;
    color: var(--primary-light);
    margin-bottom: 28px;
}
.hero-badge .dot {
    width: 6px; height: 6px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.4); }
}

.hero-title {
    font-size: 60px;
    line-height: 1.15;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 24px;
    background: linear-gradient(180deg, #ffffff 0%, #b8d4f0 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-title .hl {
    background: var(--grad-blue);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    position: relative;
}
.hero-title .hl::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0; right: 0;
    height: 4px;
    background: var(--grad-blue);
    border-radius: 2px;
    opacity: 0.5;
}
.hero-sub {
    max-width: 720px;
    margin: 0 auto 40px;
    font-size: 17px;
    color: var(--text-dim);
}
.hero-sub strong { color: #fff; font-weight: 600; }

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 80px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 26px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all .25s;
    text-decoration: none;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary {
    background: var(--grad-blue);
    color: #fff;
    box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(30,136,229,0.45);
    color: #fff;
}
.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-ghost:hover {
    background: rgba(255,255,255,0.05);
    border-color: var(--primary-light);
    color: #fff;
}
.btn-sm { padding: 10px 18px; font-size: 14px; }
.btn-block { width: 100%; justify-content: center; }

/* Hero 统计 */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    max-width: 880px;
    margin: 0 auto;
    padding: 32px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    backdrop-filter: blur(10px);
}
.stat { text-align: center; padding: 0 12px; border-right: 1px solid var(--border); }
.stat:last-child { border-right: none; }
.stat-num {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    line-height: 1;
    background: var(--grad-blue);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 8px;
}
.stat-num sup { font-size: 16px; color: var(--primary-light); }
.stat-label { font-size: 13px; color: var(--text-dim); }

.scroll-cue {
    position: absolute;
    bottom: 30px;
    left: 50%; transform: translateX(-50%);
    width: 22px; height: 36px;
    border: 2px solid var(--text-mute);
    border-radius: 14px;
    z-index: 3;
}
.scroll-cue span {
    position: absolute;
    top: 6px; left: 50%; transform: translateX(-50%);
    width: 3px; height: 8px;
    background: var(--primary-light);
    border-radius: 2px;
    animation: scroll 2s infinite;
}
@keyframes scroll {
    0% { opacity: 0; top: 6px; }
    50% { opacity: 1; }
    100% { opacity: 0; top: 22px; }
}

/* ================== 业务领域：三大方向 ================== */
.direction-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    align-items: stretch;
}

.direction-card {
    position: relative;
    padding: 36px 30px 32px;
    background: linear-gradient(180deg, rgba(13,71,161,0.32) 0%, rgba(13,71,161,0.18) 100%);
    border: 1px solid rgba(64,164,255,0.22);
    border-radius: 16px;
    overflow: hidden;
    transition: transform .35s cubic-bezier(.2,.8,.2,1),
                border-color .35s,
                box-shadow .35s;
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
}

.direction-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--c1,#1E88E5), var(--c2,#26C6DA));
    opacity: .85;
}

.dir-glow {
    position: absolute;
    top: -40px; right: -40px;
    width: 160px; height: 160px;
    background: radial-gradient(circle, var(--c1,#1E88E5) 0%, transparent 70%);
    opacity: .15;
    pointer-events: none;
    transition: opacity .35s;
}

.direction-card:hover {
    transform: translateY(-8px);
    border-color: rgba(64,164,255,0.55);
    box-shadow: 0 24px 60px rgba(0,30,80,.5);
}
.direction-card:hover .dir-glow { opacity: .28; }

/* 方向主题色（蓝 / 青 / 紫渐变） */
.dir-consult { --c1:#1E88E5; --c2:#26C6DA; }
.dir-ops     { --c1:#26C6DA; --c2:#7E57C2; }
.dir-agent   { --c1:#7E57C2; --c2:#EC407A; }

/* 头部：编号 + 图标 + 标签 + 标题 */
.dir-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 22px;
}
.dir-num {
    font-size: 36px;
    font-weight: 800;
    line-height: 1;
    color: transparent;
    background: linear-gradient(135deg, var(--c1,#1E88E5), var(--c2,#26C6DA));
    -webkit-background-clip: text;
    background-clip: text;
    flex-shrink: 0;
}
.dir-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--c1,#1E88E5), var(--c2,#26C6DA));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 6px 18px rgba(30,136,229,.35);
    flex-shrink: 0;
}
.dir-icon svg { width: 24px; height: 24px; }
.dir-meta { flex: 1; min-width: 0; }
.dir-tag {
    font-size: 11px;
    letter-spacing: 1.6px;
    color: var(--c1,#1E88E5);
    margin-bottom: 4px;
    font-weight: 600;
}
.dir-meta h3 {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
}

/* 描述 */
.dir-desc {
    font-size: 14px;
    color: #9bb1c8;
    line-height: 1.75;
    margin-bottom: 22px;
    padding-bottom: 18px;
    border-bottom: 1px dashed rgba(64,164,255,.18);
}
.dir-desc strong { color: #d6e4f3; }

/* 服务条目 */
.dir-services {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 22px;
    flex-grow: 1;
}
.ds-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}
.ds-num {
    flex-shrink: 0;
    width: 28px; height: 28px;
    border-radius: 8px;
    background: rgba(64,164,255,.10);
    border: 1px solid rgba(64,164,255,.30);
    color: var(--c1,#1E88E5);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    margin-top: 2px;
}
.ds-item h4 {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 4px;
}
.ds-item p {
    font-size: 12.5px;
    color: #8fa6c0;
    line-height: 1.6;
}

/* 典型场景 chips */
.dir-scenes {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
    margin-bottom: 26px;
    padding-top: 16px;
    border-top: 1px dashed rgba(64,164,255,.18);
}
.ds-label {
    font-size: 12px;
    color: #6b88a6;
    font-weight: 600;
    margin-right: 6px;
}
.ds-chip {
    font-size: 12px;
    padding: 5px 10px;
    border-radius: 6px;
    background: rgba(64,164,255,.10);
    border: 1px solid rgba(64,164,255,.22);
    color: #b8d0ee;
    white-space: nowrap;
}

/* 底部 CTA */
.dir-cta {
    width: 100%;
    justify-content: center;
    margin-top: auto;
}

/* 全链路闭环 */
.loop-bar {
    margin-top: 60px;
    padding: 28px 32px;
    background: rgba(13,71,161,.18);
    border: 1px solid rgba(64,164,255,.22);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.loop-step {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 18px;
    border-radius: 10px;
    background: rgba(30,136,229,.10);
    border: 1px solid rgba(64,164,255,.25);
}
.loop-ico { font-size: 24px; line-height: 1; }
.loop-text { display: flex; flex-direction: column; }
.loop-text b {
    font-size: 14px;
    color: #fff;
    font-weight: 700;
}
.loop-text span {
    font-size: 12px;
    color: #8fa6c0;
    margin-top: 2px;
}
.loop-arrow {
    color: var(--primary);
    font-size: 22px;
    font-weight: 700;
}

/* ================== 产品卡片 ================== */
.product-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 60px;
}
.product-card {
    background: linear-gradient(135deg, rgba(30,136,229,0.08) 0%, rgba(13,71,161,0.04) 100%);
    border: 1px solid rgba(30,136,229,0.25);
    border-radius: var(--r-lg);
    overflow: hidden;
    transition: all .3s;
}
.product-card:hover {
    transform: translateY(-4px);
    border-color: rgba(30,136,229,0.50);
    box-shadow: 0 20px 50px rgba(30,136,229,0.20);
}
.product-top {
    padding: 32px 32px 24px;
    background:
        radial-gradient(circle at 80% 20%, rgba(30,136,229,0.25) 0%, transparent 50%),
        linear-gradient(135deg, rgba(30,136,229,0.15) 0%, rgba(13,71,161,0.10) 100%);
    border-bottom: 1px solid var(--border);
}
.product-top.alt {
    background:
        radial-gradient(circle at 80% 20%, rgba(38,198,218,0.25) 0%, transparent 50%),
        linear-gradient(135deg, rgba(38,198,218,0.15) 0%, rgba(0,131,143,0.10) 100%);
}
.product-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--grad-blue);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
    border-radius: 100px;
    margin-bottom: 14px;
}
.product-tag.teal { background: var(--grad-teal); }

.product-top h3 {
    font-size: 24px;
    color: #fff;
    margin-bottom: 8px;
}
.product-sub {
    color: var(--text-dim);
    font-size: 14px;
    line-height: 1.6;
}
.product-body { padding: 28px 32px 32px; }

.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}
.feat {
    display: flex;
    gap: 12px;
    padding: 12px;
    background: rgba(255,255,255,0.03);
    border-radius: var(--r-sm);
    border: 1px solid var(--border);
}
.feat-ico { font-size: 20px; flex-shrink: 0; }
.feat h4 {
    font-size: 14px;
    color: #fff;
    margin-bottom: 4px;
    font-weight: 600;
}
.feat p {
    font-size: 12px;
    color: var(--text-mute);
    line-height: 1.5;
}
.product-cta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* 行业方案 */
.solution-strip {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 40px;
}
.ss-head { text-align: center; margin-bottom: 28px; }
.ss-head h3 { font-size: 22px; color: #fff; margin-bottom: 6px; }
.ss-head p { color: var(--text-dim); font-size: 14px; }

.ss-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.ss-card {
    text-align: center;
    padding: 24px 16px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    transition: all .25s;
}
.ss-card:hover {
    background: rgba(30,136,229,0.08);
    border-color: rgba(30,136,229,0.30);
    transform: translateY(-3px);
}
.ss-ico { font-size: 32px; margin-bottom: 10px; }
.ss-card h4 { font-size: 16px; color: #fff; margin-bottom: 4px; }
.ss-card p { font-size: 12px; color: var(--text-mute); line-height: 1.5; }

/* ================== 案例 ================== */
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.case-card {
    padding: 30px 28px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    transition: all .3s;
    display: flex;
    flex-direction: column;
}
.case-card:hover {
    transform: translateY(-5px);
    background: var(--surface-2);
    border-color: rgba(30,136,229,0.25);
}
.case-tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(30,136,229,0.15);
    color: var(--primary-light);
    font-size: 11px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 14px;
    width: fit-content;
}
.case-tag.teal { background: rgba(38,198,218,0.15); color: var(--accent); }
.case-tag.purple { background: rgba(126,87,194,0.15); color: #B39DDB; }

.case-card h3 {
    font-size: 18px;
    color: #fff;
    margin-bottom: 10px;
    line-height: 1.4;
}
.case-card p {
    color: var(--text-dim);
    font-size: 13px;
    line-height: 1.65;
    flex-grow: 1;
    margin-bottom: 18px;
}
.case-stats {
    display: flex;
    gap: 12px;
    padding: 14px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    margin-bottom: 14px;
}
.case-stats > div {
    flex: 1;
    text-align: center;
}
.case-stats b {
    display: block;
    font-size: 18px;
    color: var(--primary-light);
    font-weight: 700;
}
.case-stats span {
    font-size: 11px;
    color: var(--text-mute);
}
.case-stack {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}
.case-stack span {
    padding: 3px 10px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 11px;
    color: var(--text-dim);
}

/* ================== 关于 ================== */
.about-wrap {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}
.about-left h2 {
    font-size: 36px;
    color: #fff;
    margin-bottom: 20px;
    line-height: 1.3;
}
.about-lead {
    color: var(--text-dim);
    margin-bottom: 14px;
    line-height: 1.8;
}
.about-lead strong { color: #fff; font-weight: 600; }

.about-pillars {
    margin-top: 32px;
    display: grid;
    gap: 16px;
}
.pillar {
    display: flex;
    gap: 16px;
    padding: 18px 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    transition: all .25s;
}
.pillar:hover {
    border-color: rgba(30,136,229,0.30);
    background: var(--surface-2);
}
.pillar-ico { font-size: 28px; flex-shrink: 0; }
.pillar h4 { font-size: 16px; color: #fff; margin-bottom: 4px; }
.pillar p { font-size: 13px; color: var(--text-dim); }

.about-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 28px;
    position: sticky;
    top: 100px;
}
.about-card h4 {
    font-size: 16px;
    color: #fff;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.bar {
    margin-bottom: 14px;
    font-size: 13px;
    color: var(--text-dim);
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.bar i {
    display: block;
    height: 6px;
    background: var(--surface-2);
    border-radius: 3px;
    position: relative;
    overflow: hidden;
}
.bar i::after {
    content: '';
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: var(--w);
    background: var(--grad-blue);
    border-radius: 3px;
    transition: width 1.2s ease;
}

/* ================== 联系 ================== */
.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}
.contact-left h2 {
    font-size: 36px;
    color: #fff;
    margin-bottom: 16px;
    line-height: 1.3;
}
.contact-left > p {
    color: var(--text-dim);
    margin-bottom: 32px;
    line-height: 1.8;
}

.contact-list {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 18px;
}
.contact-list li {
    display: flex;
    gap: 16px;
    align-items: start;
    padding: 16px 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    transition: all .25s;
}
.contact-list li:hover {
    border-color: rgba(30,136,229,0.25);
    background: var(--surface-2);
}
.cl-ico {
    width: 40px; height: 40px;
    background: rgba(30,136,229,0.12);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}
.cl-label { font-size: 12px; color: var(--text-mute); margin-bottom: 4px; }
.cl-ico + div > *:last-child { color: #fff; font-size: 15px; }

.contact-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 32px;
}
.contact-form h4 {
    font-size: 18px;
    color: #fff;
    margin-bottom: 20px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 12px 14px;
    margin-bottom: 12px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    color: #fff;
    font-size: 14px;
    font-family: inherit;
    transition: all .2s;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(30,136,229,0.06);
}
.contact-form select { cursor: pointer; }
.contact-form select option { background: var(--bg-2); }
.contact-form textarea { resize: vertical; min-height: 90px; }
.form-tip { font-size: 12px; color: var(--text-mute); text-align: center; margin-top: 12px; }

/* ================== Footer ================== */
.footer {
    background: linear-gradient(180deg, transparent 0%, rgba(13,71,161,0.08) 100%);
    border-top: 1px solid var(--border);
    margin-top: 60px;
}
.footer-inner {
    display: grid;
    grid-template-columns: 1.4fr 2fr;
    gap: 60px;
    padding: 60px 24px 40px;
}
.footer-brand { display: flex; gap: 14px; align-items: center; }
.fb-name { font-size: 16px; color: #fff; font-weight: 600; margin-bottom: 4px; }
.fb-sub { font-size: 12px; color: var(--text-dim); }

.footer-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.fcol h5 {
    font-size: 13px;
    color: #fff;
    margin-bottom: 14px;
    letter-spacing: 1px;
}
.fcol a {
    display: block;
    font-size: 13px;
    color: var(--text-dim);
    padding: 4px 0;
    transition: color .2s, transform .2s;
}
.fcol a:hover { color: var(--primary-light); transform: translateX(2px); }

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    background: rgba(0,0,0,0.20);
}
.fb-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 12px;
    color: var(--text-dim);
}
.fb-left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.dot-sep { color: var(--text-mute); }
.beian {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--text-dim);
    transition: color .2s;
}
.beian svg { width: 13px; height: 13px; }
.beian:hover { color: var(--primary-light); }

.fb-right { display: flex; align-items: center; gap: 12px; }
.ssl-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: rgba(38,198,218,0.10);
    color: var(--accent);
    border: 1px solid rgba(38,198,218,0.30);
    border-radius: 100px;
    font-size: 11px;
}
.ssl-badge svg { width: 12px; height: 12px; }
.domain {
    color: var(--primary-light);
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* ================== 响应式 ================== */
@media (max-width: 1024px) {
    .hero-title { font-size: 48px; }
    .direction-grid { grid-template-columns: repeat(2, 1fr); }
    .loop-bar { gap: 10px; }
    .loop-arrow { display: none; }
    .product-grid { grid-template-columns: 1fr; }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .ss-grid { grid-template-columns: repeat(2, 1fr); }
    .about-wrap { grid-template-columns: 1fr; }
    .about-card { position: static; }
    .contact-wrap { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 720px) {
    .section { padding: 70px 0; }
    .section-head h2 { font-size: 28px; }
    .hero { padding-top: 110px; min-height: auto; }
    .hero-title { font-size: 36px; }
    .hero-sub { font-size: 15px; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); padding: 22px; gap: 12px; }
    .stat { padding: 8px 4px; border-right: none; }
    .stat:nth-child(1), .stat:nth-child(2) { border-bottom: 1px solid var(--border); padding-bottom: 16px; margin-bottom: 8px; }
    .stat-num { font-size: 28px; }
    .nav-links {
        position: absolute; top: 100%; left: 0; right: 0;
        flex-direction: column;
        background: var(--bg-2);
        padding: 16px 24px;
        gap: 0;
        border-bottom: 1px solid var(--border);
        max-height: 0;
        overflow: hidden;
        transition: max-height .3s;
    }
    .nav-links.open { max-height: 360px; }
    .nav-links a { width: 100%; padding: 12px 0; border-bottom: 1px solid var(--border); border-radius: 0; }
    .nav-links a:last-child { border-bottom: none; }
    .nav-cta { margin-left: 0; }
    .nav-toggle { display: flex; }
    .direction-grid { grid-template-columns: 1fr; gap: 20px; }
    .case-grid { grid-template-columns: 1fr; }
    .ss-grid { grid-template-columns: 1fr; }
    .feature-row { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-cols { grid-template-columns: 1fr 1fr; gap: 22px; }
    .fb-row { font-size: 11px; }
    .fb-left { font-size: 11px; }
}

/* ================== 滚动动画 ================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .8s, transform .8s;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px; left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 14px 26px;
    background: var(--grad-blue);
    color: #fff;
    border-radius: 100px;
    box-shadow: 0 10px 30px rgba(30,136,229,0.40);
    z-index: 200;
    transition: transform .3s;
    font-size: 14px;
}
.toast.show { transform: translateX(-50%) translateY(0); }