/* ============================================================
   京尚易和 - 公司业务展示网站样式表
   设计风格：现代科技感 + 东方雅致
   主色：深墨蓝 #0A1628 / 青瓷绿 #3DBFA2 / 暖金 #D4A574
   ============================================================ */

/* ---------- 主题变量 ---------- */
:root {
    /* 色彩 */
    --color-bg: #0A1628;
    --color-bg-alt: #0F1E33;
    --color-bg-elevated: #142841;
    --color-surface: #16263E;
    --color-surface-hover: #1B2F4A;
    --color-border: rgba(245, 241, 232, 0.08);
    --color-border-strong: rgba(245, 241, 232, 0.15);
    --color-accent: #3DBFA2;
    --color-accent-dim: rgba(61, 191, 162, 0.15);
    --color-accent-glow: rgba(61, 191, 162, 0.35);
    --color-gold: #D4A574;
    --color-gold-dim: rgba(212, 165, 116, 0.15);
    --color-text: #F5F1E8;
    --color-text-secondary: #8B9AAE;
    --color-text-muted: #5A6B82;

    /* 字体 */
    --font-serif: "Noto Serif SC", "Songti SC", serif;
    --font-sans: "Noto Sans SC", -apple-system, "PingFang SC", sans-serif;
    --font-display: "Fraunces", "Noto Serif SC", serif;

    /* 尺寸 */
    --container: 1200px;
    --nav-height: 76px;
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* 过渡 */
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --t-fast: 0.2s var(--ease);
    --t-base: 0.4s var(--ease);
    --t-slow: 0.7s var(--ease-out);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-weight: 400;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ---------- 容器 ---------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 32px;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: all var(--t-fast);
    cursor: pointer;
    white-space: nowrap;
}
.btn-sm { padding: 10px 20px; font-size: 14px; }

.btn-primary {
    background: var(--color-accent);
    color: var(--color-bg);
    box-shadow: 0 4px 20px var(--color-accent-glow);
}
.btn-primary:hover {
    background: #4AD0B0;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--color-accent-glow);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border-strong);
}
.btn-ghost:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-accent-dim);
}

/* ============================================================
   顶部导航
   ============================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: all var(--t-base);
    background: transparent;
}
.navbar.scrolled {
    background: rgba(10, 22, 40, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.nav-container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 32px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    overflow: visible;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text);
    transition: color var(--t-fast);
}
.logo-mark {
    color: var(--color-accent);
    display: flex;
    transition: transform var(--t-base);
}
.logo:hover .logo-mark { transform: rotate(-5deg) scale(1.05); }
.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}
.logo-cn {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.04em;
}
.logo-en {
    font-family: var(--font-display);
    font-size: 9px;
    font-weight: 400;
    letter-spacing: 0.25em;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    align-items: stretch;
    gap: 4px;
    flex: 1;
    justify-content: center;
    overflow: visible;
}

.nav-item {
    position: relative;
    display: flex;
    align-items: center;
}
.nav-item.open {
    z-index: 100;
}
.nav-link {
    display: block;
    padding: 10px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: all var(--t-fast);
    position: relative;
}
.nav-link::after {
    content: "";
    position: absolute;
    bottom: 6px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: all var(--t-base);
    transform: translateX(-50%);
}
.nav-link:hover { color: var(--color-accent); }
.nav-link:hover::after { width: 20px; }

/* 下拉菜单 */
.has-dropdown > .nav-link::before {
    content: "";
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    margin-left: 6px;
    vertical-align: middle;
    opacity: 0.6;
    transition: transform var(--t-fast);
}
.has-dropdown.open > .nav-link::before { transform: rotate(180deg); }

.dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    margin-top: 0;
    padding-top: 12px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--t-base);
    pointer-events: none;
    z-index: 999;
    width: max-content;
}
.has-dropdown.open .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

/* 下拉面板 */
.dropdown-inner {
    background: rgba(15, 30, 51, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    padding: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(61, 191, 162, 0.05);
    min-width: 300px;
    position: relative;
}
.dropdown-inner::before {
    content: "";
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: rgba(15, 30, 51, 0.95);
    border-left: 1px solid var(--color-border-strong);
    border-top: 1px solid var(--color-border-strong);
}

.dropdown-wide .dropdown-inner { min-width: 640px; }
.dropdown-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}

/* 下拉项 */
.dropdown-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    transition: all var(--t-fast);
    opacity: 0;
    transform: translateY(8px);
}
.has-dropdown:hover .dropdown-item {
    animation: ddItemIn 0.5s var(--ease-out) forwards;
}
.has-dropdown:hover .dropdown-item:nth-child(1) { animation-delay: 0.05s; }
.has-dropdown:hover .dropdown-item:nth-child(2) { animation-delay: 0.1s; }
.has-dropdown:hover .dropdown-item:nth-child(3) { animation-delay: 0.15s; }
.has-dropdown:hover .dropdown-item:nth-child(4) { animation-delay: 0.2s; }
.has-dropdown:hover .dropdown-item:nth-child(5) { animation-delay: 0.25s; }
.has-dropdown:hover .dropdown-item:nth-child(6) { animation-delay: 0.3s; }
.has-dropdown:hover .dropdown-item:nth-child(7) { animation-delay: 0.35s; }
.has-dropdown:hover .dropdown-item:nth-child(8) { animation-delay: 0.4s; }
.has-dropdown:hover .dropdown-item:nth-child(9) { animation-delay: 0.45s; }

@keyframes ddItemIn {
    to { opacity: 1; transform: translateY(0); }
}

.dropdown-item:hover {
    background: var(--color-accent-dim);
}
.dd-icon {
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
    transition: transform var(--t-fast);
}
.dropdown-item:hover .dd-icon { transform: scale(1.1); }
.dd-text { display: flex; flex-direction: column; gap: 2px; }
.dd-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
}
.dd-desc {
    font-size: 12px;
    color: var(--color-text-secondary);
    line-height: 1.4;
}

/* 右侧 CTA */
.nav-cta {
    display: flex;
    align-items: center;
    gap: 16px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}
.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--t-base);
}
.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 主视觉
   ============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: var(--nav-height);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(61, 191, 162, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(61, 191, 162, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}
.glow-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    animation: floatGlow 12s ease-in-out infinite;
}
.glow-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-gold) 0%, transparent 70%);
    bottom: -200px;
    left: -100px;
    opacity: 0.25;
    animation: floatGlow 15s ease-in-out infinite reverse;
}
@keyframes floatGlow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 32px;
    width: 100%;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content { max-width: 640px; }

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--color-accent-dim);
    border: 1px solid rgba(61, 191, 162, 0.2);
    border-radius: 100px;
    font-size: 13px;
    color: var(--color-accent);
    margin-bottom: 28px;
}
.tag-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(61, 191, 162, 0.2);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 4px rgba(61, 191, 162, 0.2); }
    50% { box-shadow: 0 0 0 8px rgba(61, 191, 162, 0); }
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: 0.02em;
    margin-bottom: 28px;
}
.reveal-line {
    display: block;
    overflow: hidden;
}
.title-accent {
    color: var(--color-accent);
    position: relative;
    display: inline-block;
}
.title-accent::after {
    content: "";
    position: absolute;
    bottom: 4px;
    left: 0;
    right: 0;
    height: 12px;
    background: var(--color-accent-glow);
    z-index: -1;
    filter: blur(8px);
}

.hero-subtitle {
    font-size: 17px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 64px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
}
.stat { display: flex; flex-direction: column; }
.stat-num {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 600;
    color: var(--color-accent);
    line-height: 1;
}
.stat-label {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-top: 6px;
}
.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border-strong);
}

/* Hero 视觉 */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.visual-orb {
    width: 100%;
    max-width: 500px;
    animation: orbRotate 30s linear infinite;
}
@keyframes orbRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.orbit-node {
    animation: orbitPulse 3s ease-in-out infinite;
}
.orbit-2 { animation-delay: 1s; }
.orbit-3 { animation-delay: 2s; }
@keyframes orbitPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* 滚动提示 */
.scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--color-text-muted);
    letter-spacing: 0.15em;
}
.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollDown 2s ease-in-out infinite;
}
@keyframes scrollDown {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============================================================
   通用 Section
   ============================================================ */
.section {
    padding: 120px 0;
    position: relative;
}
.section-alt {
    background: var(--color-bg-alt);
}

.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 72px;
}
.section-head-left {
    text-align: left;
    margin-left: 0;
}

.section-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    text-transform: uppercase;
    margin-bottom: 16px;
    padding: 4px 0;
    position: relative;
}
.section-label::before {
    content: "";
    display: inline-block;
    width: 24px;
    height: 1px;
    background: var(--color-accent);
    vertical-align: middle;
    margin-right: 12px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: 0.01em;
}
.accent { color: var(--color-accent); }

.section-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

/* ============================================================
   业务总览
   ============================================================ */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.overview-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: all var(--t-base);
    position: relative;
    overflow: hidden;
}
.overview-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    transform: scaleX(0);
    transition: transform var(--t-base);
}
.overview-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-border-strong);
    background: var(--color-surface-hover);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3), 0 0 30px rgba(61, 191, 162, 0.08);
}
.overview-card:hover::before { transform: scaleX(1); }

.oc-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    border: 1px solid var(--color-border-strong);
}
.oc-icon-1 { color: var(--color-accent); background: var(--color-accent-dim); }
.oc-icon-2 { color: var(--color-gold); background: var(--color-gold-dim); }
.oc-icon-3 { color: var(--color-accent); background: var(--color-accent-dim); }

.oc-title {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
}
.oc-desc {
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}
.oc-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.oc-count {
    font-size: 13px;
    color: var(--color-accent);
    padding: 4px 12px;
    background: var(--color-accent-dim);
    border-radius: 100px;
}
.oc-arrow {
    color: var(--color-text-secondary);
    font-size: 18px;
    transition: all var(--t-fast);
}
.overview-card:hover .oc-arrow {
    color: var(--color-accent);
    transform: translateX(4px);
}

/* ============================================================
   App 开发模块
   ============================================================ */
.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: all var(--t-base);
    position: relative;
    overflow: hidden;
}
.service-card:hover {
    transform: translateY(-4px);
    border-color: rgba(61, 191, 162, 0.3);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.sc-num {
    position: absolute;
    top: 20px;
    right: 24px;
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 300;
    color: var(--color-border-strong);
    line-height: 1;
    transition: color var(--t-base);
}
.service-card:hover .sc-num { color: var(--color-accent-dim); }

.sc-icon {
    color: var(--color-accent);
    margin-bottom: 24px;
}
.sc-title {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}
.sc-desc {
    font-size: 13px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}
.sc-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.sc-tags li {
    font-size: 11px;
    padding: 4px 10px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    color: var(--color-text-secondary);
}

/* ============================================================
   证件申请模块
   ============================================================ */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.cert-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: all var(--t-base);
    position: relative;
    overflow: hidden;
}
.cert-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, var(--color-accent-dim), transparent 60%);
    opacity: 0;
    transition: opacity var(--t-base);
    pointer-events: none;
}
.cert-card:hover {
    transform: translateY(-4px);
    border-color: rgba(61, 191, 162, 0.25);
}
.cert-card:hover::after { opacity: 1; }

.cc-icon {
    color: var(--color-accent);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}
.cc-title {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}
.cc-desc {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

/* ============================================================
   App 上架模块
   ============================================================ */
.upload-layout {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 60px;
    align-items: start;
}

.upload-intro {
    position: sticky;
    top: calc(var(--nav-height) + 40px);
}
.ui-title {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
}
.ui-desc {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}
.ui-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.ui-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}
.uf-check {
    width: 24px;
    height: 24px;
    background: var(--color-accent-dim);
    color: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    flex-shrink: 0;
}

.upload-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.upload-item {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 24px 28px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all var(--t-base);
    cursor: pointer;
}
.upload-item:hover {
    background: var(--color-surface-hover);
    border-color: rgba(61, 191, 162, 0.25);
    transform: translateX(4px);
}
.up-num {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 300;
    color: var(--color-accent);
    flex-shrink: 0;
    width: 40px;
}
.up-body { flex: 1; }
.up-title {
    font-family: var(--font-serif);
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
}
.up-desc {
    font-size: 13px;
    color: var(--color-text-secondary);
}
.up-arrow {
    color: var(--color-text-muted);
    font-size: 18px;
    transition: all var(--t-fast);
}
.upload-item:hover .up-arrow {
    color: var(--color-accent);
    transform: translateX(4px);
}

/* ============================================================
   核心优势
   ============================================================ */
.section-advantages {
    position: relative;
    overflow: hidden;
}
.section-advantages::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--color-accent-dim) 0%, transparent 70%);
    opacity: 0.3;
    pointer-events: none;
}

.adv-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.adv-card {
    text-align: center;
    padding: 40px 24px;
    border-radius: var(--radius);
    background: rgba(22, 38, 62, 0.5);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
    transition: all var(--t-base);
}
.adv-card:hover {
    transform: translateY(-6px);
    border-color: rgba(61, 191, 162, 0.3);
    background: rgba(22, 38, 62, 0.8);
}
.adv-icon {
    color: var(--color-accent);
    margin-bottom: 24px;
    display: inline-flex;
}
.adv-title {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}
.adv-desc {
    font-size: 13px;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

/* ============================================================
   服务流程
   ============================================================ */
.process-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}
.process-line {
    position: absolute;
    top: 28px;
    left: 12.5%;
    right: 12.5%;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--color-accent) 15%,
        var(--color-accent) 85%,
        transparent 100%);
    opacity: 0.3;
}

.process-step {
    text-align: center;
    position: relative;
}
.ps-node {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 2px solid var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    position: relative;
    z-index: 1;
    transition: all var(--t-base);
}
.ps-node span {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    color: var(--color-accent);
}
.process-step:hover .ps-node {
    background: var(--color-accent);
    box-shadow: 0 0 0 8px var(--color-accent-dim);
}
.process-step:hover .ps-node span { color: var(--color-bg); }

.ps-title {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}
.ps-desc {
    font-size: 13px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    max-width: 240px;
    margin: 0 auto;
}

/* ============================================================
   咨询入口
   ============================================================ */
.section-contact { padding: 80px 0 120px; }

.contact-card {
    position: relative;
    background: linear-gradient(135deg, var(--color-bg-elevated) 0%, var(--color-surface) 100%);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-lg);
    padding: 64px;
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 48px;
    align-items: center;
    overflow: hidden;
}

.contact-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}
.cb-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
}
.cb-glow-1 {
    width: 400px;
    height: 400px;
    background: var(--color-accent);
    opacity: 0.1;
    top: -150px;
    right: -100px;
}
.cb-glow-2 {
    width: 300px;
    height: 300px;
    background: var(--color-gold);
    opacity: 0.08;
    bottom: -100px;
    left: -50px;
}

.contact-content { position: relative; z-index: 1; }
.contact-title {
    font-family: var(--font-serif);
    font-size: clamp(28px, 3.5vw, 40px);
    font-weight: 700;
    line-height: 1.25;
    margin: 16px 0 20px;
}
.contact-desc {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 40px;
}
.cm-item {
    display: flex;
    align-items: center;
    gap: 16px;
}
.cm-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    background: var(--color-accent-dim);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.cm-body { display: flex; flex-direction: column; }
.cm-label {
    font-size: 16px;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
}
.cm-value {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
}

.contact-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* 二维码 */
.contact-qr {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}
.qr-placeholder {
    width: 200px;
    height: 200px;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-border-strong);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}
.qr-text {
    font-size: 13px;
    color: var(--color-text-secondary);
    text-align: center;
    line-height: 1.6;
}

/* ============================================================
   页脚
   ============================================================ */
.footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 72px 0 32px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 48px;
    margin-bottom: 48px;
}
.footer-brand .logo { margin-bottom: 20px; }
.footer-tagline {
    font-size: 14px;
    line-height: 1.8;
    color: var(--color-text-secondary);
}
.footer-title {
    font-family: var(--font-serif);
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-text);
}
.footer-links li {
    margin-bottom: 12px;
}
.footer-links a, .footer-links li {
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: color var(--t-fast);
}
.footer-links a:hover { color: var(--color-accent); }

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}
.footer-bottom p {
    font-size: 13px;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
}

/* ============================================================
   滚动揭示动画
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Hero 区特殊动画 */
.hero .reveal {
    transition-delay: 0.2s;
}
.hero .reveal:nth-child(2) { transition-delay: 0.4s; }
.hero .reveal:nth-child(3) { transition-delay: 0.6s; }
.hero .reveal:nth-child(4) { transition-delay: 0.8s; }
.hero .reveal:nth-child(5) { transition-delay: 1s; }

/* staggered 子项 */
.overview-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.overview-grid .reveal:nth-child(3) { transition-delay: 0.2s; }
.service-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.service-grid .reveal:nth-child(3) { transition-delay: 0.2s; }
.service-grid .reveal:nth-child(4) { transition-delay: 0.3s; }
.cert-grid .reveal:nth-child(2) { transition-delay: 0.05s; }
.cert-grid .reveal:nth-child(3) { transition-delay: 0.1s; }
.cert-grid .reveal:nth-child(4) { transition-delay: 0.15s; }
.cert-grid .reveal:nth-child(5) { transition-delay: 0.2s; }
.cert-grid .reveal:nth-child(6) { transition-delay: 0.25s; }
.cert-grid .reveal:nth-child(7) { transition-delay: 0.3s; }
.cert-grid .reveal:nth-child(8) { transition-delay: 0.35s; }
.cert-grid .reveal:nth-child(9) { transition-delay: 0.4s; }
.upload-list .reveal:nth-child(2) { transition-delay: 0.08s; }
.upload-list .reveal:nth-child(3) { transition-delay: 0.16s; }
.upload-list .reveal:nth-child(4) { transition-delay: 0.24s; }
.upload-list .reveal:nth-child(5) { transition-delay: 0.32s; }
.upload-list .reveal:nth-child(6) { transition-delay: 0.4s; }
.adv-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.adv-grid .reveal:nth-child(3) { transition-delay: 0.2s; }
.adv-grid .reveal:nth-child(4) { transition-delay: 0.3s; }
.process-timeline .reveal:nth-child(2) { transition-delay: 0.1s; }
.process-timeline .reveal:nth-child(3) { transition-delay: 0.2s; }
.process-timeline .reveal:nth-child(4) { transition-delay: 0.3s; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
    .hero-container { grid-template-columns: 1fr; gap: 40px; }
    .hero-visual { display: none; }
    .upload-layout { grid-template-columns: 1fr; gap: 40px; }
    .upload-intro { position: static; }
    .service-grid { grid-template-columns: repeat(2, 1fr); }
    .cert-grid { grid-template-columns: repeat(3, 1fr); }
    .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .process-timeline { grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .process-line { display: none; }
    .dropdown-wide .dropdown-inner { min-width: 480px; }
    .dropdown-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    :root { --nav-height: 64px; }
    .container { padding: 0 20px; }
    .nav-container { padding: 0 20px; }

    /* 移动端导航 */
    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-bg);
        flex-direction: column;
        align-items: stretch;
        padding: 32px 20px;
        gap: 8px;
        transform: translateX(100%);
        transition: transform var(--t-base);
        overflow-y: auto;
        justify-content: flex-start;
        height: 500px;
    }
    .nav-menu.active { transform: translateX(0); }

    .nav-item { width: 100%; }
    .nav-link {
        padding: 16px 20px;
        width: 100%;
        font-size: 16px;
        border-bottom: 1px solid var(--color-border);
    }
    .has-dropdown > .nav-link::before { display: none; }

    .dropdown {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        margin-top: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--t-base);
    }
    .has-dropdown.expanded .dropdown { max-height: 1000px; }
    .dropdown-inner {
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 0 0 0 20px;
        min-width: auto;
    }
    .dropdown-inner::before { display: none; }
    .dropdown-wide .dropdown-inner { min-width: auto; }
    .dropdown-grid { grid-template-columns: 1fr; }
    .dropdown-item {
        opacity: 1;
        transform: none;
        padding: 12px 16px;
    }
    .has-dropdown:hover .dropdown-item { animation: none; }

    .menu-toggle { display: flex; }
    .nav-cta .btn { display: none; }

    /* Hero */
    .hero { min-height: auto; padding: 120px 0 80px; }
    .hero-stats { gap: 20px; }
    .stat-num { font-size: 28px; }
    .scroll-hint { display: none; }

    /* Section */
    .section { padding: 80px 0; }
    .section-head { margin-bottom: 48px; }

    /* 网格调整 */
    .overview-grid { grid-template-columns: 1fr; }
    .service-grid { grid-template-columns: 1fr; }
    .cert-grid { grid-template-columns: repeat(2, 1fr); }
    .adv-grid { grid-template-columns: 1fr; }
    .process-timeline { grid-template-columns: 1fr; }

    /* 联系 */
    .contact-card {
        padding: 40px 28px;
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .contact-actions { flex-direction: column; }
    .contact-actions .btn { width: 100%; }

    /* 页脚 */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .cert-grid { grid-template-columns: 1fr; }
    .hero-stats { flex-wrap: wrap; }
    .stat-divider { display: none; }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    .reveal { opacity: 1; transform: none; }
}

/* ============ 服务详情页样式 ============ */
.service-hero {
    padding: 80px 0 60px;
    background: linear-gradient(180deg, rgba(10,22,40,0.98) 0%, rgba(10,22,40,0.95) 100%);
}

.service-header {
    text-align: center;
}

.sh-breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 32px;
    font-size: 14px;
    color: var(--color-text-muted);
}

.bc-home {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--t-fast);
}

.bc-home:hover { color: var(--color-accent-light); }

.sh-content {
    max-width: 800px;
    margin: 0 auto;
}

.sh-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sh-icon svg {
    width: 100%;
    height: 100%;
}

.sh-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    font-family: 'Noto Serif SC', serif;
}

.sh-desc {
    font-size: 18px;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 32px;
}

.sh-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.service-features {
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.feature-card {
    background: var(--color-card);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--t-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: 0 12px 40px rgba(61, 191, 162, 0.12);
}

.fc-icon {
    width: 48px;
    height: 48px;
    background: rgba(61, 191, 162, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.fc-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.fc-desc {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.service-details {
    padding: 80px 0;
}

.details-content {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 48px;
}

.details-main {
    background: var(--color-card);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.details-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 24px;
    font-family: 'Noto Serif SC', serif;
}

.details-body {
    color: var(--color-text);
    line-height: 1.9;
    font-size: 15px;
}

.details-body h3 {
    font-size: 18px;
    font-weight: 600;
    margin: 28px 0 16px;
    color: var(--color-text);
}

.details-body p { margin-bottom: 16px; }

.details-body ul, .details-body ol {
    padding-left: 24px;
    margin-bottom: 16px;
}

.details-body li { margin-bottom: 8px; }

.details-body strong { color: var(--color-accent); }

.details-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-card {
    background: var(--color-card);
    padding: 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.sc-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 20px;
}

.sc-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sc-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.sc-label {
    font-size: 14px;
    color: var(--color-text-muted);
}

.sc-value {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 500;
    text-align: right;
    max-width: 60%;
}

.service-related {
    padding: 80px 0;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.related-card {
    background: var(--color-card);
    padding: 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    text-decoration: none;
    transition: all var(--t-base);
    display: block;
}

.related-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: 0 12px 40px rgba(61, 191, 162, 0.12);
}

.rc-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin-bottom: 16px;
}

.rc-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.rc-desc {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

@media (max-width: 960px) {
    .details-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .sh-title { font-size: 32px; }
    .sh-desc { font-size: 16px; }
    .sh-icon { width: 64px; height: 64px; }
    .service-hero { padding: 60px 0 40px; }
    .service-features, .service-details, .service-related { padding: 50px 0; }
    .details-main { padding: 28px; }
    .features-grid, .related-grid { grid-template-columns: 1fr; }
}

/* ============ 悬浮菜单 ============ */
.float-menu {
    position: fixed;
    right: 24px;
    bottom: 48px;
    z-index: 9999;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--t-normal), transform var(--t-normal);
}

.fm-container {
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-xl);
    padding: 8px;
    border: 1px solid rgba(61, 191, 162, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.fm-item {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    transition: all var(--t-fast);
    position: relative;
    text-decoration: none;
    border: none;
    background: transparent;
    cursor: pointer;
}

.fm-item:hover {
    background: rgba(61, 191, 162, 0.15);
    color: var(--color-accent);
    transform: translateX(-4px);
}

.fm-top {
    background: var(--color-accent);
    color: var(--color-bg);
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.fm-top:hover {
    background: var(--color-accent-light);
    color: var(--color-bg);
    transform: translateX(-4px);
}

.fm-tooltip {
    position: absolute;
    right: 56px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(10, 22, 40, 0.98);
    color: var(--color-text);
    font-size: 13px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--t-fast);
    pointer-events: none;
    border: 1px solid var(--color-border);
}

.fm-item:hover .fm-tooltip {
    opacity: 1;
    visibility: visible;
}

@media (max-width: 768px) {
    .float-menu {
        right: 12px;
        bottom: 24px;
    }
    .fm-item { width: 44px; height: 44px; }
    .fm-tooltip { display: none; }
}

/* ============ 咨询弹窗样式 ============ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 99999;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--t-base);
}

.modal-overlay.active {
    opacity: 1;
}

.modal-overlay.show {
    display: flex;
}

.modal-content {
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 520px;
    padding: 36px;
    position: relative;
    transform: scale(0.95) translateY(20px);
    transition: all var(--t-base);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all var(--t-fast);
}

.modal-close:hover {
    background: var(--color-accent-dim);
    color: var(--color-accent);
}

.modal-header {
    text-align: center;
    margin-bottom: 32px;
}

.modal-title {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}

.modal-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.modal-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.modal-body .contact-qr {
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.modal-body .qr-code {
    width: 160px;
    height: 160px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border-strong);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.modal-body .qr-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    text-align: center;
}

.modal-body .contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
    width: 100%;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.modal-body .contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    color: var(--color-text);
}

.modal-body .contact-item svg {
    width: 20px;
    height: 20px;
    color: var(--color-accent);
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .modal-content {
        padding: 28px 24px;
        max-width: 95%;
    }
    .modal-title { font-size: 20px; }
    .modal-body .qr-code { width: 140px; height: 140px; }
}