/* =========================================================
   上海端陌信息有限公司 - 官网样式
   科技风 · 深蓝/青蓝主色 · 响应式
========================================================= */

:root {
    --bg-0: #050a18;
    --bg-1: #0a1226;
    --bg-2: #0e1832;
    --bg-3: #131e3d;
    --line: rgba(118, 168, 255, 0.15);
    --line-2: rgba(118, 168, 255, 0.25);
    --text: #e6ecff;
    --text-2: #a6b3d4;
    --text-3: #6c7aa0;
    --primary: #4f8cff;
    --primary-2: #00d4ff;
    --primary-3: #7a5cff;
    --accent: #00ffd1;
    --grad-1: linear-gradient(135deg, #4f8cff 0%, #00d4ff 100%);
    --grad-2: linear-gradient(135deg, #7a5cff 0%, #00d4ff 100%);
    --grad-3: linear-gradient(135deg, #00ffd1 0%, #4f8cff 100%);
    --radius: 14px;
    --radius-sm: 8px;
    --shadow: 0 20px 60px -20px rgba(0, 100, 255, 0.25);
    --transition: 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-0);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-2); }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

::selection { background: var(--primary); color: #fff; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-0); }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg, var(--primary), var(--primary-2)); border-radius: 4px; }

/* ============ 通用 ============ */
.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 28px;
}
.section {
    position: relative;
    padding: 120px 0;
}
.section-header {
    text-align: center;
    margin-bottom: 70px;
}
.section-header.light { color: var(--text); }
.section-tag {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 4px;
    font-weight: 600;
    color: var(--primary-2);
    padding: 6px 16px;
    border: 1px solid var(--line-2);
    border-radius: 100px;
    background: rgba(0, 212, 255, 0.06);
    margin-bottom: 18px;
    text-transform: uppercase;
}
.section-title {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 300;
    letter-spacing: 1px;
    margin-bottom: 14px;
}
.section-title strong {
    font-weight: 700;
    background: var(--grad-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.section-desc {
    color: var(--text-2);
    font-size: 16px;
    max-width: 680px;
    margin: 0 auto;
}

.gradient-text {
    background: var(--grad-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ============ 导航 ============ */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(5, 10, 24, 0.6);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
}
.navbar.scrolled {
    background: rgba(5, 10, 24, 0.85);
    border-bottom-color: var(--line);
}
.nav-container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 28px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}
.logo-mark {
    display: flex;
    gap: 3px;
    align-items: center;
    width: 36px;
    height: 36px;
    justify-content: center;
    background: var(--grad-1);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(79, 140, 255, 0.4);
    position: relative;
    overflow: hidden;
}
.logo-mark::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.3) 50%, transparent 70%);
    transform: translateX(-100%);
    animation: shine 3s infinite;
}
@keyframes shine {
    to { transform: translateX(100%); }
}
.logo-dot {
    width: 6px; height: 6px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(255,255,255,0.6);
}
.logo-text strong {
    display: block;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text);
}
.logo-text span {
    display: block;
    font-size: 10px;
    color: var(--text-3);
    letter-spacing: 2px;
    text-transform: uppercase;
}
.nav-menu {
    display: flex;
    gap: 4px;
    align-items: center;
}
.nav-link {
    padding: 8px 18px;
    font-size: 14px;
    color: var(--text-2);
    border-radius: 8px;
    position: relative;
    transition: all var(--transition);
}
.nav-link:hover { color: var(--text); background: rgba(79, 140, 255, 0.08); }
.nav-link.active {
    color: var(--text);
    background: rgba(79, 140, 255, 0.12);
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 18px;
    height: 2px;
    background: var(--grad-1);
    border-radius: 2px;
}

.nav-toggle {
    display: none;
    width: 36px; height: 36px;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    padding: 8px;
}
.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
#particles {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}
.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(118, 168, 255, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(118, 168, 255, 0.07) 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%);
}
.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.5;
    pointer-events: none;
}
.glow-1 {
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(79, 140, 255, 0.5), transparent 70%);
    top: -200px; right: -200px;
    animation: float1 12s ease-in-out infinite;
}
.glow-2 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.4), transparent 70%);
    bottom: -150px; left: -150px;
    animation: float2 15s ease-in-out infinite;
}
@keyframes float1 { 50% { transform: translate(-30px, 40px); } }
@keyframes float2 { 50% { transform: translate(40px, -30px); } }

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 980px;
    margin: 0 auto;
    padding: 0 28px;
    text-align: center;
}
.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid var(--line-2);
    border-radius: 100px;
    font-size: 13px;
    color: var(--primary-2);
    letter-spacing: 1px;
    margin-bottom: 30px;
    animation: fadeUp 0.8s ease both;
}
.tag-pulse {
    width: 8px; height: 8px;
    background: var(--primary-2);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.7);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(0, 212, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0); }
}
.hero-title {
    font-size: clamp(36px, 6vw, 68px);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1px;
}
.title-line { display: block; opacity: 0; animation: fadeUp 0.8s ease both; }
.title-line:nth-child(1) { animation-delay: 0.1s; }
.title-line:nth-child(2) { animation-delay: 0.3s; }
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.hero-subtitle {
    font-size: clamp(15px, 1.6vw, 18px);
    color: var(--text-2);
    max-width: 760px;
    margin: 0 auto 40px;
    line-height: 1.9;
    animation: fadeUp 0.8s 0.5s ease both;
}
.hero-subtitle strong {
    color: var(--primary-2);
    font-weight: 600;
}
.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 80px;
    animation: fadeUp 0.8s 0.7s ease both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 30px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: all var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.btn svg { width: 18px; height: 18px; transition: transform var(--transition); }
.btn-primary {
    background: var(--grad-1);
    color: #fff;
    box-shadow: 0 8px 30px -8px rgba(79, 140, 255, 0.6);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px -8px rgba(79, 140, 255, 0.8);
    color: #fff;
}
.btn-primary:hover svg { transform: translateX(4px); }
.btn-ghost {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--line-2);
    color: var(--text);
    backdrop-filter: blur(10px);
}
.btn-ghost:hover {
    background: rgba(79, 140, 255, 0.1);
    border-color: var(--primary);
    color: var(--text);
}
.btn-block { width: 100%; justify-content: center; }

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 880px;
    margin: 0 auto;
    padding: 36px 0;
    border-top: 1px solid var(--line);
    animation: fadeUp 0.8s 0.9s ease both;
}
.stat { text-align: center; }
.stat-num {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    background: var(--grad-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    display: inline-block;
}
.stat-suffix {
    display: inline-block;
    margin-left: 4px;
    font-size: 16px;
    color: var(--text-2);
    font-weight: 500;
}
.stat-label {
    color: var(--text-3);
    font-size: 13px;
    margin-top: 8px;
}

.scroll-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-3);
    font-size: 11px;
    letter-spacing: 4px;
    z-index: 2;
}
.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, var(--primary-2), transparent);
    position: relative;
    overflow: hidden;
}
.scroll-line::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 20px;
    background: var(--primary-2);
    animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(200%); }
}

/* ============ 关于 ============ */
.about { background: linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%); }
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 80px;
    align-items: center;
}
.about-text h3 {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 24px;
    line-height: 1.5;
}
.about-text p {
    color: var(--text-2);
    margin-bottom: 18px;
    font-size: 15px;
}
.about-text strong { color: var(--primary-2); font-weight: 600; }

.feature-list {
    list-style: none;
    margin-top: 36px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.feature-list li {
    display: flex;
    gap: 14px;
    padding: 20px;
    background: rgba(79, 140, 255, 0.04);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: all var(--transition);
}
.feature-list li:hover {
    background: rgba(79, 140, 255, 0.08);
    border-color: var(--line-2);
    transform: translateY(-4px);
}
.feature-icon {
    font-size: 24px;
    flex-shrink: 0;
    width: 44px; height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--grad-1);
    border-radius: 10px;
}
.feature-list strong {
    display: block;
    color: var(--text);
    font-size: 15px;
    margin-bottom: 4px;
}
.feature-list p {
    font-size: 13px;
    color: var(--text-2);
    margin: 0;
    line-height: 1.6;
}

.about-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 480px;
    position: relative;
}
.orbit-card {
    position: relative;
    width: 380px;
    height: 380px;
}
.orbit-core {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 160px; height: 160px;
}
.core-ring {
    position: absolute;
    inset: 0;
    border: 2px solid transparent;
    border-radius: 50%;
    background: var(--grad-1) border-box;
    -webkit-mask: linear-gradient(#000 0 0) padding-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: spin 8s linear infinite;
}
.core-ring::after {
    content: '';
    position: absolute;
    inset: 10px;
    border: 1px dashed var(--line-2);
    border-radius: 50%;
    animation: spin 12s linear infinite reverse;
}
@keyframes spin { to { transform: rotate(360deg); } }
.core-inner {
    position: absolute;
    inset: 30px;
    background: var(--bg-2);
    border: 1px solid var(--line-2);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 60px rgba(79, 140, 255, 0.4) inset;
}
.core-inner span {
    font-size: 36px;
    font-weight: 700;
    background: var(--grad-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}
.core-inner small {
    font-size: 12px;
    color: var(--text-2);
    letter-spacing: 2px;
    margin-top: 6px;
}
.orbit-item {
    position: absolute;
    background: rgba(14, 24, 50, 0.85);
    backdrop-filter: blur(10px);
    border: 1px solid var(--line-2);
    padding: 12px 22px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow);
}
.orbit-dot {
    width: 8px; height: 8px;
    background: var(--primary-2);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--primary-2);
    animation: pulse 2s infinite;
}
.orbit-1 { top: 0; left: 50%; transform: translateX(-50%); }
.orbit-2 { right: 0; top: 50%; transform: translateY(-50%); }
.orbit-3 { bottom: 0; left: 50%; transform: translateX(-50%); }
.orbit-4 { left: 0; top: 50%; transform: translateY(-50%); }

/* ============ FDE ============ */
.fde {
    background:
        radial-gradient(ellipse at top, rgba(79, 140, 255, 0.08), transparent 60%),
        var(--bg-1);
    position: relative;
}
.fde::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(118, 168, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(118, 168, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}
.fde .container { position: relative; z-index: 1; }
.fde-intro {
    max-width: 820px;
    margin: 0 auto 60px;
    text-align: center;
    color: var(--text-2);
    font-size: 16px;
    line-height: 1.9;
}
.fde-intro strong { color: var(--primary-2); }

.process {
    display: flex;
    align-items: stretch;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}
.process-step {
    flex: 1;
    min-width: 220px;
    max-width: 240px;
    padding: 32px 24px;
    background: rgba(14, 24, 50, 0.5);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: all var(--transition);
    position: relative;
}
.process-step:hover {
    border-color: var(--primary);
    transform: translateY(-6px);
    box-shadow: 0 20px 40px -10px rgba(79, 140, 255, 0.3);
}
.step-num {
    font-size: 32px;
    font-weight: 800;
    background: var(--grad-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
    font-family: 'SF Mono', Menlo, monospace;
}
.process-step h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
}
.process-step p {
    color: var(--text-2);
    font-size: 13.5px;
    line-height: 1.7;
    margin-bottom: 16px;
}
.step-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.step-tags span {
    font-size: 11px;
    padding: 4px 10px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid var(--line-2);
    border-radius: 100px;
    color: var(--primary-2);
}
.process-arrow {
    align-self: center;
    width: 24px; height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-2), transparent);
    position: relative;
    flex-shrink: 0;
}
.process-arrow::after {
    content: '▶';
    position: absolute;
    right: -4px; top: 50%;
    transform: translateY(-50%);
    color: var(--primary-2);
    font-size: 12px;
}

/* ============ 业务 ============ */
.business {
    background: var(--bg-0);
}
.biz-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.biz-card {
    padding: 36px 28px;
    background: linear-gradient(180deg, rgba(14, 24, 50, 0.5), rgba(14, 24, 50, 0.2));
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.biz-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: var(--grad-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}
.biz-card:hover {
    border-color: var(--line-2);
    transform: translateY(-8px);
    box-shadow: 0 30px 60px -20px rgba(79, 140, 255, 0.3);
}
.biz-card:hover::before { transform: scaleX(1); }
.biz-icon {
    width: 64px; height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(79, 140, 255, 0.15), rgba(0, 212, 255, 0.05));
    border: 1px solid var(--line-2);
    border-radius: 16px;
    color: var(--primary-2);
    margin-bottom: 22px;
}
.biz-icon svg { width: 36px; height: 36px; }
.biz-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
}
.biz-card > p {
    color: var(--text-2);
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.7;
}
.biz-card ul {
    list-style: none;
    padding-top: 16px;
    border-top: 1px dashed var(--line);
}
.biz-card li {
    color: var(--text-2);
    font-size: 13.5px;
    padding: 6px 0 6px 18px;
    position: relative;
}
.biz-card li::before {
    content: '';
    position: absolute;
    left: 0; top: 14px;
    width: 8px; height: 1px;
    background: var(--primary-2);
}

/* ============ 团队 ============ */
.team {
    background: linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%);
}
.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.team-feature {
    padding: 36px 30px;
    background: rgba(14, 24, 50, 0.4);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.team-feature::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%; height: 2px;
    background: var(--grad-2);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}
.team-feature:hover {
    background: rgba(14, 24, 50, 0.7);
    border-color: var(--line-2);
    transform: translateY(-6px);
}
.team-feature:hover::after { transform: scaleX(1); }
.team-num {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-3);
    margin-bottom: 8px;
    font-family: 'SF Mono', Menlo, monospace;
    opacity: 0.4;
    letter-spacing: -1px;
}
.team-feature h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
}
.team-feature p {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.8;
}

/* ============ 价值 ============ */
.value {
    background: linear-gradient(135deg, var(--bg-2) 0%, var(--bg-3) 100%);
    position: relative;
    overflow: hidden;
}
.value::before {
    content: '';
    position: absolute;
    top: -100px; right: -100px;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.2), transparent 70%);
    border-radius: 50%;
    filter: blur(80px);
}
.value-wrap {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.value-left .section-tag { margin-bottom: 18px; }
.value-left h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 300;
    line-height: 1.3;
    margin-bottom: 16px;
}
.value-left h2 strong {
    font-weight: 700;
    background: var(--grad-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.value-left p { color: var(--text-2); }

.value-right {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.value-item {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: rgba(5, 10, 24, 0.5);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: all var(--transition);
}
.value-item:hover {
    border-color: var(--line-2);
    background: rgba(5, 10, 24, 0.8);
    transform: translateY(-4px);
}
.value-icon {
    width: 40px; height: 40px;
    flex-shrink: 0;
    background: var(--grad-2);
    color: #fff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
}
.value-item h5 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}
.value-item p {
    color: var(--text-2);
    font-size: 13px;
    line-height: 1.6;
}

/* ============ 联系 ============ */
.contact { background: var(--bg-0); }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: start;
}
.contact-info h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}
.contact-info > p {
    color: var(--text-2);
    margin-bottom: 36px;
}
.contact-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.contact-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: rgba(14, 24, 50, 0.4);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: all var(--transition);
}
.contact-item:hover {
    border-color: var(--line-2);
    transform: translateX(4px);
}
.contact-ico {
    width: 48px; height: 48px;
    flex-shrink: 0;
    background: var(--grad-1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}
.contact-item strong {
    display: block;
    color: var(--text);
    font-size: 14px;
    margin-bottom: 4px;
}
.contact-item p {
    color: var(--text-2);
    font-size: 14px;
}
.contact-item a:hover { color: var(--primary-2); }

.contact-form {
    padding: 40px;
    background: linear-gradient(180deg, rgba(14, 24, 50, 0.6), rgba(14, 24, 50, 0.3));
    border: 1px solid var(--line);
    border-radius: var(--radius);
    position: relative;
    overflow: hidden;
}
.contact-form::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad-1);
}
.contact-form h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 6px;
}
.form-tip { color: var(--text-2); font-size: 13px; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    color: var(--text-2);
    font-size: 13px;
    margin-bottom: 6px;
    font-weight: 500;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(5, 10, 24, 0.6);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: inherit;
    font-size: 14px;
    transition: all var(--transition);
    outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    background: rgba(5, 10, 24, 0.8);
    box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.15);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-group select { cursor: pointer; }
.form-group select option { background: var(--bg-1); color: var(--text); }

/* ============ 页脚 ============ */
.footer {
    background: var(--bg-1);
    border-top: 1px solid var(--line);
    padding: 60px 0 30px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand p {
    color: var(--text-2);
    font-size: 13px;
    margin-top: 16px;
    line-height: 1.7;
}
.footer-col h5 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 16px;
    letter-spacing: 1px;
}
.footer-col a,
.footer-col p {
    display: block;
    color: var(--text-2);
    font-size: 13px;
    margin-bottom: 10px;
    transition: color var(--transition);
}
.footer-col a:hover { color: var(--primary-2); }
.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    color: var(--text-3);
    font-size: 12.5px;
}
.footer-bottom p { margin: 0; }
.icp a { color: var(--text-2); }
.icp a:hover { color: var(--primary-2); }
.icp .dot { margin: 0 8px; color: var(--text-3); }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
    .about-grid, .value-wrap, .contact-grid { grid-template-columns: 1fr; gap: 50px; }
    .biz-grid { grid-template-columns: repeat(2, 1fr); }
    .team-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .orbit-card { width: 320px; height: 320px; }
    .process { flex-direction: column; align-items: center; }
    .process-arrow { width: 2px; height: 24px; }
    .process-arrow::after { right: 50%; top: auto; bottom: -4px; transform: translateX(50%) rotate(90deg); }
}

@media (max-width: 768px) {
    .section { padding: 80px 0; }
    .nav-menu {
        position: fixed;
        top: 72px; left: 0; right: 0;
        flex-direction: column;
        background: rgba(5, 10, 24, 0.95);
        backdrop-filter: blur(20px);
        padding: 20px;
        gap: 6px;
        transform: translateY(-200%);
        opacity: 0;
        transition: all var(--transition);
        border-bottom: 1px solid var(--line);
    }
    .nav-menu.open { transform: translateY(0); opacity: 1; }
    .nav-menu a { padding: 14px 18px; }
    .nav-toggle { display: flex; }
    .hero { padding: 100px 0 60px; }
    .hero-title { font-size: clamp(32px, 8vw, 48px); }
    .biz-grid, .team-grid, .footer-grid { grid-template-columns: 1fr; }
    .feature-list { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .contact-form { padding: 28px 20px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .scroll-hint { display: none; }
}

@media (max-width: 480px) {
    .container { padding: 0 20px; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .btn { justify-content: center; }
    .orbit-card { width: 280px; height: 280px; }
    .core-inner span { font-size: 28px; }
}

/* 入场动画 */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}
[data-aos-delay="200"] { transition-delay: 0.2s; }
[data-aos-delay="400"] { transition-delay: 0.4s; }
[data-aos-delay="600"] { transition-delay: 0.6s; }