/* ── 基础变量 (IT 信任色) ── */
:root {
    --ink: #111111;
    --ink2: #444444;
    --ink3: #777777;
    --paper: #F9F7F1;
    --paper2: #F4F4F0;
    --paper3: #EFEFEA;
    --line: rgba(17, 17, 17, 0.12);

    --accent: #1A4A8A;
    --accent2: #123666;
    --gold: #B8913A;

    --serif: 'Noto Serif SC', serif;
    --sans: 'Instrument Sans', sans-serif;
    --mono: 'DM Mono', monospace;
}

/* ── 全局重置 ── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--sans);
    background: var(--paper);
    color: var(--ink);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ── 导航栏 ── */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 48px;
    height: 64px;
    background: rgba(249, 247, 241, 0.94);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
}

.logo {
    font-family: 'Playfair Display', serif;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #111111;
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo span {
    color: #1A4A8A;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    font-size: 13px;
    font-weight: 500;
    color: var(--ink2);
    text-decoration: none;
    letter-spacing: 0.02em;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
}

.nav-cta {
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 600;
    padding: 8px 20px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s;
}

.nav-cta:hover {
    background: var(--accent2);
}

/* ── SECTION BASE (首页及通用) ── */
section {
    padding: 100px 48px;
}

.section-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.section-label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-label::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 1px;
    background: var(--gold);
}

h2 {
    font-family: var(--serif);
    font-size: clamp(28px, 3vw, 40px);
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: 16px;
}

.section-sub {
    font-size: 16px;
    color: var(--ink2);
    line-height: 1.7;
    max-width: 560px;
    margin-bottom: 60px;
}

.divider {
    height: 1px;
    background: var(--line);
}

/* ── HERO (首页) ── */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 48px 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 52%;
    height: 100%;
    background: var(--paper2);
    clip-path: polygon(8% 0, 100% 0, 100% 100%, 0% 100%);
    z-index: 0;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    position: relative;
    z-index: 1;
}

.hero-label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.hero-label::before {
    content: '';
    display: inline-block;
    width: 28px;
    height: 1px;
    background: var(--gold);
}

h1 {
    font-family: var(--serif);
    font-size: clamp(36px, 4.5vw, 58px);
    font-weight: 600;
    line-height: 1.22;
    letter-spacing: -0.01em;
    color: var(--ink);
    margin-bottom: 28px;
}

h1 em {
    font-style: normal;
    color: var(--accent);
}

.hero-desc {
    font-size: 16px;
    color: var(--ink2);
    line-height: 1.75;
    max-width: 460px;
    margin-bottom: 40px;
}

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

.btn-primary {
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 600;
    padding: 14px 28px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s, transform 0.15s;
}

.btn-primary:hover {
    background: var(--accent2);
    transform: translateY(-1px);
}

.btn-outline {
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 500;
    padding: 13px 28px;
    background: transparent;
    color: var(--ink);
    border: 1.5px solid var(--ink);
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    transition: border-color 0.2s, color 0.2s;
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.hero-right {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 16px;
}

.stat-card {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 22px 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(26, 74, 138, 0.08);
}

.stat-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--paper2);
    border-radius: 8px;
}

.stat-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--accent);
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.stat-desc {
    font-size: 13px;
    color: var(--ink2);
    line-height: 1.55;
}

.stat-desc strong {
    color: var(--ink);
    font-weight: 600;
    display: block;
    margin-bottom: 3px;
    font-size: 14px;
}

/* ── SERVICES (首页) ── */
.services-bg {
    background: var(--paper2);
}

.service-phases {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
}

.phase {
    background: var(--paper);
    padding: 44px 40px;
    position: relative;
    overflow: hidden;
    transition: background 0.25s;
}

.phase:hover {
    background: #fff;
}

.phase::after {
    content: attr(data-num);
    position: absolute;
    bottom: -10px;
    right: 16px;
    font-family: var(--serif);
    font-size: 96px;
    font-weight: 600;
    color: var(--line);
    line-height: 1;
    pointer-events: none;
    transition: color 0.25s;
}

.phase:hover::after {
    color: rgba(26, 74, 138, 0.07);
}

.phase-num {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: 16px;
}

.phase h3 {
    font-family: var(--serif);
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 8px;
}

.phase-tagline {
    font-size: 12px;
    color: var(--gold);
    font-family: var(--mono);
    letter-spacing: 0.05em;
    margin-bottom: 20px;
}

.phase p {
    font-size: 14px;
    color: var(--ink2);
    line-height: 1.75;
    margin-bottom: 20px;
}

.phase-items {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.phase-items li {
    font-size: 13px;
    color: var(--ink2);
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 12px;
    background: var(--paper2);
    border-radius: 4px;
}

.phase-items li::before {
    content: '→';
    color: var(--accent);
    font-family: var(--mono);
    font-size: 12px;
    flex-shrink: 0;
    margin-top: 1px;
}

/* ── PRODUCTS (首页) ── */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.product-group {
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
}

.product-group-header {
    padding: 20px 24px;
    background: var(--paper2);
    border-bottom: 1px solid var(--line);
}

.product-group-header .group-tag {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink3);
    margin-bottom: 6px;
}

.product-group-header h4 {
    font-family: var(--serif);
    font-size: 17px;
    font-weight: 600;
}

.product-list {
    padding: 16px 0;
}

.product-item {
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
    transition: background 0.15s;
}

.product-item:last-child {
    border-bottom: none;
}

.product-item:hover {
    background: var(--paper2);
}

.product-name {
    font-size: 14px;
    font-weight: 500;
}

.product-badge {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.06em;
    padding: 3px 8px;
    border-radius: 3px;
}

.badge-domestic {
    background: #E8F0FE;
    color: #1A4A8A;
}

.badge-global {
    background: var(--paper3);
    color: var(--ink);
}

.badge-cloud {
    background: var(--line);
    color: var(--ink2);
}

/* ── HOW WE WORK (首页) ── */
/* .how-bg {
    background: var(--ink);
    color: var(--paper);
} */

.how-bg {
    background: var(--accent);
    /* 已替换为深海蓝，拒绝黑箱感 */
    color: var(--paper);
}

.how-bg h2 {
    color: var(--paper);
}

.how-bg .section-label {
    color: var(--gold);
}

.how-bg .section-label::before {
    background: var(--gold);
}

.how-bg .section-sub {
    color: rgba(249, 247, 241, 0.65);
}

.steps-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    overflow: hidden;
}

.step {
    padding: 36px 28px;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.step:last-child {
    border-right: none;
}

.step-n {
    font-family: var(--serif);
    font-size: 42px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.08);
    line-height: 1;
    margin-bottom: 16px;
}

.step h4 {
    font-family: var(--serif);
    font-size: 17px;
    font-weight: 600;
    color: var(--paper);
    margin-bottom: 12px;
}

.step p {
    font-size: 13px;
    color: rgba(249, 247, 241, 0.55);
    line-height: 1.65;
}

.step-tag {
    margin-top: 20px;
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.1em;
    color: var(--gold);
}

/* ── WHY (首页) ── */
.why-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1px;
    background: var(--line);
}

.why-item {
    background: var(--paper);
    padding: 40px 32px;
}

.why-icon {
    width: 40px;
    height: 40px;
    background: var(--paper2);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.why-icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--accent);
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.why-item h4 {
    font-family: var(--serif);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.why-item p {
    font-size: 14px;
    color: var(--ink2);
    line-height: 1.7;
}

/* ── INSIGHTS & ARTICLE CARDS (首页及列表页公用) ── */
.insights-bg {
    background: var(--paper2);
}

.insights-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.article-card {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.article-card:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 28px rgba(26, 74, 138, 0.1);
    transform: translateY(-2px);
}

.article-card-body {
    padding: 28px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-tag {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 12px;
}

.article-card h3,
.article-card h4 {
    font-family: var(--serif);
    font-size: 17px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 12px;
    color: var(--ink);
}

.article-card p {
    font-size: 13px;
    color: var(--ink2);
    line-height: 1.65;
    flex: 1;
}

.article-card-footer {
    padding: 16px 28px;
    border-top: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.article-date {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--ink3);
}

.article-arrow {
    font-size: 14px;
    color: var(--accent);
    transition: transform 0.2s;
}

.article-card:hover .article-arrow {
    transform: translateX(4px);
}

.insights-more {
    text-align: center;
}

/* ── 列表页专属 (PAGE HEADER & FILTERS) ── */
.page-header {
    padding: 120px 48px 64px;
    background: var(--paper2);
    border-bottom: 1px solid var(--line);
}

.page-header-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.breadcrumb {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: var(--ink3);
    margin-bottom: 20px;
}

.breadcrumb a {
    color: var(--ink3);
    text-decoration: none;
}

.breadcrumb a:hover {
    color: var(--accent);
}

.page-header h1 {
    font-family: var(--serif);
    font-size: clamp(28px, 3.5vw, 44px);
    font-weight: 600;
    margin-bottom: 16px;
}

.page-desc {
    font-size: 16px;
    color: var(--ink2);
    max-width: 540px;
    line-height: 1.7;
}

.filter-bar {
    padding: 24px 48px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    position: sticky;
    top: 64px;
    z-index: 50;
}

.filter-bar-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-btn {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    padding: 7px 16px;
    border-radius: 3px;
    cursor: pointer;
    border: 1px solid var(--line);
    background: transparent;
    color: var(--ink2);
    transition: all 0.15s;
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.filter-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.articles-section {
    padding: 60px 48px 100px;
}

.articles-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.featured-article {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    margin-bottom: 48px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.featured-article:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 32px rgba(26, 74, 138, 0.08);
}

.featured-body {
    padding: 48px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.featured-tag {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 16px;
}

.featured-body h2 {
    font-family: var(--serif);
    font-size: clamp(20px, 2vw, 26px);
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 16px;
}

.featured-body p {
    font-size: 14px;
    color: var(--ink2);
    line-height: 1.75;
    flex: 1;
    margin-bottom: 32px;
}

.featured-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.featured-date {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--ink3);
}

.read-more {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 6px;
}

.featured-visual {
    background: var(--paper2);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px;
}

.featured-visual-inner {
    width: 100%;
    max-width: 240px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 24px;
}

.mock-tag {
    height: 8px;
    width: 60px;
    background: var(--gold);
    opacity: 0.5;
    border-radius: 2px;
    margin-bottom: 16px;
}

.mock-title {
    height: 10px;
    background: var(--ink);
    opacity: 0.15;
    border-radius: 2px;
    margin-bottom: 8px;
}

.mock-title.short {
    width: 70%;
}

.mock-body {
    height: 6px;
    background: var(--ink);
    opacity: 0.1;
    border-radius: 2px;
    margin-bottom: 6px;
}

/* ── 详情页专属 (ARTICLE DETAIL) ── */
.article-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 48px 80px;
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 80px;
    align-items: start;
}

.article-main h1 {
    font-family: var(--serif);
    font-size: clamp(24px, 2.8vw, 36px);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 24px;
}

.article-main .article-tag {
    display: flex;
    align-items: center;
    gap: 8px;
}

.article-main .article-tag::before {
    content: '';
    width: 20px;
    height: 1px;
    background: var(--gold);
    display: inline-block;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 24px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 48px;
}

.meta-item {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--ink3);
    letter-spacing: 0.06em;
}

.meta-item strong {
    color: var(--ink2);
}

.article-body h2 {
    font-family: var(--serif);
    font-size: 22px;
    font-weight: 600;
    margin: 48px 0 16px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
}

.article-body h3 {
    font-family: var(--serif);
    font-size: 18px;
    font-weight: 600;
    margin: 32px 0 12px;
    color: var(--ink);
}

.article-body p {
    font-size: 15px;
    color: var(--ink2);
    line-height: 1.85;
    margin-bottom: 20px;
}

.article-body ul,
.article-body ol {
    padding-left: 24px;
    margin-bottom: 20px;
}

.article-body li {
    font-size: 15px;
    color: var(--ink2);
    line-height: 1.8;
    margin-bottom: 8px;
}

.article-body strong {
    color: var(--ink);
    font-weight: 600;
}

.article-body code {
    font-family: var(--mono);
    font-size: 13px;
    background: var(--paper2);
    padding: 2px 7px;
    border-radius: 3px;
    color: var(--accent);
}

.callout {
    background: var(--paper2);
    border-left: 3px solid var(--gold);
    padding: 20px 24px;
    border-radius: 0 6px 6px 0;
    margin: 32px 0;
}

.callout p {
    margin: 0;
    font-size: 14px;
}

.callout .callout-label {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.1em;
    color: var(--gold);
    margin-bottom: 8px;
}

.step-block {
    background: var(--paper2);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 20px 24px;
    margin: 16px 0;
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.step-num {
    font-family: var(--serif);
    font-size: 24px;
    font-weight: 600;
    color: var(--accent);
    opacity: 0.3;
    line-height: 1;
    min-width: 28px;
}

.step-content h4 {
    font-family: var(--serif);
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
}

.step-content p {
    font-size: 13px;
    color: var(--ink2);
    line-height: 1.65;
    margin: 0;
}

.article-sidebar {
    position: sticky;
    top: 88px;
}

.sidebar-block {
    background: var(--paper2);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 20px;
}

.sidebar-label {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink3);
    margin-bottom: 16px;
}

.toc-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toc-list a {
    font-size: 13px;
    color: var(--ink2);
    text-decoration: none;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.45;
}

.toc-list a:hover {
    color: var(--accent);
}

.toc-list a::before {
    content: '·';
    color: var(--gold);
    flex-shrink: 0;
}

.cta-sidebar {
    background: var(--accent);
    border-radius: 8px;
    padding: 24px;
}

.cta-sidebar h4 {
    font-family: var(--serif);
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 10px;
}

.cta-sidebar p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: 16px;
}

.cta-sidebar a {
    display: block;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    padding: 10px;
    background: #fff;
    color: var(--accent);
    border-radius: 4px;
    text-decoration: none;
}

.related-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.related-list a {
    font-size: 13px;
    color: var(--ink2);
    text-decoration: none;
    line-height: 1.45;
    display: flex;
    gap: 8px;
}

.related-list a:hover {
    color: var(--accent);
}

.related-list a::before {
    content: '→';
    color: var(--accent);
    flex-shrink: 0;
    font-family: var(--mono);
    font-size: 11px;
    margin-top: 2px;
}

.article-footer {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 48px 80px;
}

.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.article-nav a {
    flex: 1;
    padding: 20px 24px;
    background: var(--paper2);
    border: 1px solid var(--line);
    border-radius: 6px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s;
}

.article-nav a:hover {
    border-color: var(--accent);
}

.nav-dir {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.1em;
    color: var(--ink3);
    margin-bottom: 6px;
}

.nav-title {
    font-family: var(--serif);
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
}

.article-nav .next {
    text-align: right;
}

/* ── 隐私政策页专属 (LEGAL) ── */
.legal-header {
    padding: 160px 48px 60px;
    background: var(--paper2);
    border-bottom: 1px solid var(--line);
    text-align: center;
}

.legal-header h1 {
    font-family: var(--serif);
    font-size: clamp(32px, 4vw, 48px);
    margin-bottom: 16px;
    color: var(--ink);
}

.legal-meta {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--ink3);
    letter-spacing: 0.1em;
}

.legal-body {
    max-width: 860px;
    margin: 0 auto;
    padding: 80px 48px 120px;
}

.legal-body h2 {
    font-family: var(--serif);
    font-size: 22px;
    font-weight: 600;
    margin: 48px 0 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
    color: var(--ink);
}

.legal-body p {
    font-size: 15px;
    color: var(--ink2);
    line-height: 1.8;
    margin-bottom: 20px;
}

.legal-body ul {
    padding-left: 24px;
    margin-bottom: 20px;
}

.legal-body li {
    font-size: 15px;
    color: var(--ink2);
    line-height: 1.8;
    margin-bottom: 10px;
}

.legal-body strong {
    color: var(--ink);
    font-weight: 600;
}

/* ── CLIENT WALL (客户墙) ── */
.client-wall {
    padding: 60px 48px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
}

.client-wall .section-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.client-label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.15em;
    color: var(--ink3);
    text-transform: uppercase;
    margin-bottom: 32px;
}

.client-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px 60px;
    width: 100%;
}

.client-logo {
    font-family: var(--serif);
    font-size: 15px;
    color: var(--ink);
    opacity: 0.4;
    transition: opacity 0.3s;
    cursor: default;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.client-logo:hover {
    opacity: 1;
}

/* ── TEAM (团队介绍) ── */
.team-bg {
    background: var(--paper);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.team-card {
    background: var(--paper2);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 40px 32px;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.team-card:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 28px rgba(26, 74, 138, 0.08);
    transform: translateY(-2px);
}

.team-cert {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.1em;
    color: #fff;
    background: var(--ink);
    padding: 4px 10px;
    border-radius: 3px;
    display: inline-block;
    margin-bottom: 24px;
}

.team-name {
    font-family: var(--serif);
    font-size: 22px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}

.team-role {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 20px;
}

.team-desc {
    font-size: 14px;
    color: var(--ink2);
    line-height: 1.7;
}

/* 补充响应式 (添加到文件最底部的 @media (max-width: 900px) 中) */
/*
    .client-grid { gap: 30px; }
    .team-grid { grid-template-columns: 1fr; }
*/







/* ── CTA 组件 ── */
.cta-section {
    background: var(--accent);
    padding: 80px 48px;
}

.cta-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.cta-left h2 {
    color: #fff;
    margin-bottom: 16px;
    font-family: var(--serif);
    font-size: 32px;
}

.cta-left p {
    color: rgba(255, 255, 255, 0.75);
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-white {
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 600;
    padding: 14px 28px;
    background: #fff;
    color: var(--accent);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: opacity 0.2s;
}

.btn-white:hover {
    opacity: 0.9;
}

.btn-ghost {
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 500;
    padding: 13px 28px;
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, 0.4);
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    transition: border-color 0.2s;
}

.btn-ghost:hover {
    border-color: rgba(255, 255, 255, 0.8);
}

.cta-right {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-block,
.wechat-block {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 24px 28px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-block-icon {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-block-icon svg {
    width: 20px;
    height: 20px;
    stroke: #fff;
    fill: none;
    stroke-width: 1.5;
}

.contact-block-text strong,
.wechat-text strong {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 0.04em;
    margin-bottom: 4px;
    font-family: var(--mono);
}

.contact-block-text span {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    font-family: var(--serif);
    letter-spacing: 0.02em;
}

.wechat-qr {
    width: 80px;
    height: 80px;
    border-radius: 6px;
    overflow: hidden;
    background: #fff;
    flex-shrink: 0;
}

.wechat-qr img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.wechat-text span {
    font-size: 15px;
    color: #fff;
    line-height: 1.5;
}

/* ── 高级深色表单样式 (附加到 style.css CTA部分) ── */
.dark-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 20px;
}

.form-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group-full {
    width: 100%;
}

.dark-form input,
.dark-form textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #fff;
    padding: 14px 16px;
    border-radius: 6px;
    font-family: var(--sans);
    font-size: 14px;
    transition: all 0.2s;
}

.dark-form input::placeholder,
.dark-form textarea::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.dark-form input:focus,
.dark-form textarea:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.8);
    background: rgba(255, 255, 255, 0.1);
}

.btn-submit {
    background: #fff;
    color: var(--accent);
    border: none;
    padding: 16px 24px;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--sans);
    border-radius: 6px;
    cursor: pointer;
    transition: opacity 0.2s;
    align-self: flex-start;
}

.btn-submit:hover {
    opacity: 0.9;
}

.btn-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-status {
    font-size: 13px;
    margin-top: 8px;
    font-weight: 500;
}

@media (max-width: 900px) {
    .form-group {
        grid-template-columns: 1fr;
    }
}






/* ── FOOTER (全新升级版) ── */
footer {
    background: var(--ink);
    color: rgba(249, 247, 241, 0.5);
    padding: 60px 48px 40px;
    border-top: 1px solid var(--line);
    font-size: 13px;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 30px;
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    font-family: 'Playfair Display', serif;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #FFFFFF;
    margin-bottom: 16px;
    line-height: 1;
}

.footer-logo span {
    color: #1A4A8A;
}

.footer-slogan {
    font-family: var(--serif);
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 24px;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-contact p {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    line-height: 1.5;
}

.footer-contact strong {
    font-family: var(--mono);
    color: var(--accent);
    font-weight: 600;
}

.footer-certs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    max-width: 500px;
}

.cert-item {
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 12px 16px;
    border-radius: 6px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: border-color 0.2s, color 0.2s;
}

.cert-item:hover {
    border-color: rgba(255, 255, 255, 0.4);
    color: #fff;
}

.cert-item::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.4);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-bottom a:hover {
    color: #fff;
}

.footer-copy {
    display: flex;
    align-items: center;
    gap: 16px;
}

.footer-legal {
    display: flex;
    align-items: center;
    gap: 20px;
    font-family: var(--mono);
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }

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

.hero-content>* {
    animation: fadeUp 0.6s ease both;
}

.hero-content>*:nth-child(1) {
    animation-delay: 0.1s;
}

.hero-content>*:nth-child(2) {
    animation-delay: 0.2s;
}

.hero-content>*:nth-child(3) {
    animation-delay: 0.3s;
}

.hero-content>*:nth-child(4) {
    animation-delay: 0.4s;
}

.stat-card:nth-child(1) {
    animation: fadeUp 0.6s ease 0.3s both;
}

.stat-card:nth-child(2) {
    animation: fadeUp 0.6s ease 0.45s both;
}

.stat-card:nth-child(3) {
    animation: fadeUp 0.6s ease 0.6s both;
}

/* ── RESPONSIVE (全站媒体查询整合) ── */
@media (max-width: 900px) {

    nav,
    footer,
    .cta-section {
        padding-left: 24px;
        padding-right: 24px;
    }

    .nav-links {
        display: none;
    }

    .hero,
    section {
        padding: 80px 24px 60px;
    }

    .hero-grid,
    .service-phases,
    .cta-inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero::before {
        display: none;
    }

    .products-grid,
    .insights-grid,
    .article-grid {
        grid-template-columns: 1fr;
    }

    .steps-row {
        grid-template-columns: 1fr 1fr;
    }

    .step:nth-child(2) {
        border-right: none;
    }

    .step:nth-child(3),
    .step:nth-child(4) {
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .why-grid {
        grid-template-columns: 1fr;
    }

    /* Articles Index Responsive */
    .page-header,
    .articles-section {
        padding-left: 24px;
        padding-right: 24px;
    }

    .filter-bar {
        padding: 16px 24px;
    }

    .featured-article {
        grid-template-columns: 1fr;
    }

    .featured-visual {
        display: none;
    }

    /* Article Detail Responsive */
    .article-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 80px 24px 40px;
    }

    .article-sidebar {
        position: static;
    }

    .article-footer {
        padding: 0 24px 60px;
    }

    /* Legal Responsive */
    .legal-header,
    .legal-body {
        padding-left: 24px;
        padding-right: 24px;
    }

    .legal-header {
        padding-top: 120px;
    }

    .legal-body {
        padding-top: 40px;
        padding-bottom: 60px;
    }

    .footer-inner {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .footer-top {
        flex-direction: column;
        gap: 40px;
    }

    .footer-certs {
        grid-template-columns: 1fr;
        width: 100%;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .footer-legal {
        flex-direction: column;
        gap: 8px;
    }

    .client-grid {
        gap: 30px;
    }

    .team-grid {
        grid-template-columns: 1fr;
    }
}