/* =========================================================
   吃瓜视频在线观看 — 全站样式表
   品牌手册风：深绿黑 / 米白 / 暖橙
   ========================================================= */

/* ---------------------------------------------------------
   Base — 基础变量、重置、字体与通用元素
   --------------------------------------------------------- */
:root {
  --color-ink: #101820;
  --color-ink-soft: #1c2630;
  --color-paper: #f7f4ef;
  --color-paper-deep: #efece6;
  --color-accent: #ff6b35;
  --color-accent-dark: #e85a2a;
  --color-text: #2c3440;
  --color-muted: #6b7280;
  --color-line: #e2ddd5;
  --color-white: #ffffff;

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --container: 1200px;
  --container-pad: 24px;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow-card: 0 2px 12px rgba(16, 24, 32, 0.06);
  --shadow-hover: 0 8px 24px rgba(16, 24, 32, 0.1);

  --header-h: 72px;
  --space-section: 88px;
  --space-section-sm: 64px;
}

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

html {
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-paper);
  color: var(--color-text);
  font-weight: 400;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-ink);
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

table {
  border-collapse: collapse;
  width: 100%;
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.25;
}

p {
  line-height: 1.7;
}

/* 键盘焦点样式 */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ---------------------------------------------------------
   Layout — 全站骨架：页头、主容器、页脚、面包屑、标题区
   --------------------------------------------------------- */

/* 全站统一容器宽度 */
.site-header,
.site-footer,
.section-inner,
.inner-main,
.error-main {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

/* ---------- 页头 ---------- */
.site-header {
  background: var(--color-ink);
  position: sticky;
  top: 0;
  z-index: 100;
  max-width: none;
  padding: 0;
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.02em;
}

.brand-tagline {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 2px;
}

.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.82);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.08);
}

.nav-link.is-current {
  color: var(--color-white);
  font-weight: 700;
  background: rgba(255, 107, 53, 0.18);
}

.btn-nav {
  flex-shrink: 0;
  font-size: 14px;
  padding: 10px 20px;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: var(--radius-sm);
  background: transparent;
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ---------- 主区域 ---------- */
.site-main {
  min-height: 60vh;
}

.inner-main {
  padding-top: 40px;
  padding-bottom: var(--space-section);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--color-muted);
  transition: color 0.2s ease;
}

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

.breadcrumb-sep {
  color: var(--color-line);
  font-size: 12px;
}

.breadcrumb-current {
  color: var(--color-ink);
  font-weight: 600;
}

/* ---------- 页面标题区 ---------- */
.page-header {
  margin-bottom: 12px;
}

.page-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.25;
}

.page-title-area p,
.page-title-block p,
.page-title p {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 760px;
  margin-top: 8px;
  margin-bottom: 32px;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--color-ink);
  max-width: none;
  padding: 0;
  margin-top: 0;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px var(--container-pad) 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
}

.footer-slogan {
  font-size: 14px;
  color: var(--color-accent);
  margin-top: 6px;
}

.footer-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 12px;
  line-height: 1.6;
}

.footer-col h3 {
  font-size: 15px;
  color: var(--color-white);
  margin-bottom: 16px;
  font-weight: 600;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  transition: color 0.2s ease;
}

.footer-col ul a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px var(--container-pad);
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  transition: background 0.2s ease, color 0.2s ease,
    border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  line-height: 1.4;
  min-height: 44px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  border-color: var(--color-ink);
  color: var(--color-ink);
  background: transparent;
}

.btn-outline:hover {
  background: var(--color-ink);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-secondary {
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--color-white);
  background: transparent;
}

.btn-secondary:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

.btn-lg {
  font-size: 17px;
  padding: 16px 40px;
}

/* ---------- 区块头部通用 ---------- */
.section-head {
  margin-bottom: 40px;
}

.section-head h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 10px;
}

.section-head p {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 640px;
}

/* ---------- 滚动出现动画（仅增强，不影响初始可见） ---------- */
.reveal {
  opacity: 1;
}

/* ---------- 底部相关链接轨道 ---------- */
.related-links {
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px var(--container-pad) 48px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.related-links-label {
  font-size: 14px;
  color: var(--color-muted);
  flex-shrink: 0;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-ink);
  padding: 8px 16px;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  transition: border-color 0.2s ease, color 0.2s ease,
    background 0.2s ease;
}

.related-links-item:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.06);
}

/* ---------------------------------------------------------
   Components — 卡片、列表、表格、FAQ、图文等通用组件
   --------------------------------------------------------- */

/* ---------- 服务卡片（首页 / 服务页共用） ---------- */
.service-card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-line);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: rgba(255, 107, 53, 0.12);
  color: var(--color-accent);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 15px;
  color: var(--color-muted);
  flex-grow: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: 20px;
  transition: gap 0.2s ease;
}

.card-link:hover {
  gap: 10px;
}

/* ---------- 图文容器 ---------- */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figcaption {
  font-size: 13px;
  color: var(--color-muted);
  padding: 8px 4px 0;
  line-height: 1.5;
}

/* ---------- 筛选按钮组 ---------- */
.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.filter-btn,
.need-btn {
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid var(--color-line);
  background: var(--color-white);
  color: var(--color-text);
  transition: background 0.2s ease, color 0.2s ease,
    border-color 0.2s ease;
  min-height: 44px;
}

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

.filter-btn.is-active,
.need-btn.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
}

/* ---------- 全宽 CTA 面板 ---------- */
.cta-panel {
  background: var(--color-ink);
  border-radius: var(--radius);
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.cta-content h2 {
  color: var(--color-white);
  font-size: 24px;
  margin-bottom: 8px;
}

.cta-content p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 16px;
}

/* ---------- 项目卡片（案例页） ---------- */
.project-card {
  background: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.project-media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.project-card:hover .project-media img {
  transform: scale(1.04);
}

.project-info {
  padding: 20px 20px 24px;
}

.project-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.1);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.project-info h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.project-info p {
  font-size: 14px;
  color: var(--color-muted);
}

/* ---------- 表格 ---------- */
.project-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: var(--color-white);
}

.project-table {
  min-width: 720px;
}

.project-table th {
  background: var(--color-ink);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  text-align: left;
  padding: 14px 20px;
}

.project-table td {
  font-size: 14px;
  padding: 14px 20px;
  border-top: 1px solid var(--color-line);
  vertical-align: top;
  line-height: 1.6;
}

.project-table tbody tr:nth-child(even) {
  background: rgba(247, 244, 239, 0.5);
}

/* ---------- FAQ ---------- */
.faq-group {
  margin-bottom: 48px;
}

.faq-group h2 {
  font-size: 22px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-ink);
}

.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-white);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: background 0.2s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item summary:hover {
  background: rgba(255, 107, 53, 0.04);
}

.faq-answer {
  padding: 0 22px 20px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--color-muted);
}

/* ---------- 内联图文 ---------- */
.content-media-inline {
  margin-top: 16px;
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 720px;
}

.content-media-inline img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 8;
  object-fit: cover;
}

/* ---------- 相关卡片 ---------- */
.related-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease,
    border-color 0.2s ease;
  display: block;
}

.related-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent);
}

.related-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
  color: var(--color-ink);
}

.related-card p {
  font-size: 14px;
  color: var(--color-muted);
}

/* ---------- 区块通用标题 ---------- */
.section-title {
  font-size: 24px;
  margin-bottom: 24px;
}

.section-block {
  margin-bottom: var(--space-section-sm);
}

.section-lead {
  font-size: 16px;
  color: var(--color-muted);
  margin-bottom: 28px;
  max-width: 720px;
}

/* ---------------------------------------------------------
   Pages — 首页
   --------------------------------------------------------- */

/* ---------- Hero ---------- */
.hero {
  background: var(--color-ink);
  padding: 72px 0;
}

.hero-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.hero-kicker {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 48px;
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-issues {
  margin-bottom: 32px;
}

.hero-issues li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 10px;
  line-height: 1.5;
}

.hero-issues li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}

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

.hero-media {
  position: relative;
}

.hero-figure {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-figure figcaption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
}

/* ---------- 问题与服务范围对照 ---------- */
.issues-services {
  padding: var(--space-section) 0;
}

.section-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.issues-services .section-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}

.issue-list h2,
.service-scope h2 {
  font-size: 22px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-line);
}

.issue-list li,
.service-scope li {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-line);
}

.issue-list li:last-child,
.service-scope li:last-child {
  border-bottom: none;
}

.issue-list h3 {
  font-size: 17px;
  margin-bottom: 6px;
  line-height: 1.4;
}

.issue-list p,
.service-scope p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
}

.service-scope h3 {
  font-size: 17px;
  color: var(--color-accent);
  margin-bottom: 6px;
}

/* ---------- 服务摘要 ---------- */
.services-summary {
  padding: 0 0 var(--space-section);
}

.service-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ---------- 流程概览 ---------- */
.process-overview {
  background: var(--color-paper-deep);
  padding: var(--space-section) 0;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  counter-reset: step;
}

.step-item {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--color-line);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}

.step-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}

.step-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.5;
}

.process-link-wrap {
  margin-top: 40px;
  text-align: center;
}

/* ---------- 案例预览 ---------- */
.cases-preview {
  padding: var(--space-section) 0;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.case-thumb {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  display: block;
}

.case-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.case-thumb:hover img {
  transform: scale(1.05);
}

.case-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(16, 24, 32, 0.6) 0%,
    rgba(16, 24, 32, 0) 50%
  );
  transition: background 0.3s ease;
}

.case-thumb:hover::after {
  background: linear-gradient(
    to top,
    rgba(16, 24, 32, 0.75) 0%,
    rgba(16, 24, 32, 0.1) 60%
  );
}

.case-tag {
  position: absolute;
  left: 16px;
  bottom: 16px;
  z-index: 2;
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  background: var(--color-accent);
  padding: 6px 14px;
  border-radius: 999px;
}

/* ---------- 合作 CTA ---------- */
.cooperation-cta {
  padding: 0 0 var(--space-section);
}

/* ---------------------------------------------------------
   Pages — 服务项目 services
   --------------------------------------------------------- */

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: var(--space-section);
}

.service-scene {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.service-scene strong {
  color: var(--color-ink);
}

.service-delivery {
  font-size: 14px;
  color: var(--color-muted);
  border-top: 1px solid var(--color-line);
  padding-top: 12px;
  margin-top: auto;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: 16px;
}

.text-link:hover {
  gap: 10px;
}

/* 地域场景 */
.region-scenarios {
  margin-bottom: var(--space-section);
}

.scenario-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: start;
}

.scenario-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-line);
}

.scenario-item:first-child {
  padding-top: 0;
}

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

.scenario-item h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.scenario-item p {
  font-size: 15px;
  color: var(--color-muted);
}

.scenario-media {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.media-figure {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 3 / 4;
}

.media-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 交付方式 */
.delivery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.delivery-item {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
}

.delivery-item h3 {
  font-size: 18px;
  margin-bottom: 10px;
  color: var(--color-accent);
}

.delivery-item p {
  font-size: 15px;
  color: var(--color-muted);
}

/* 相关推荐 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ---------------------------------------------------------
   Pages — 案例展示 cases
   --------------------------------------------------------- */

.category-filter {
  margin-bottom: 40px;
}

.project-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: var(--space-section);
}

/* 标签说明 */
.tag-legend {
  margin-bottom: var(--space-section);
}

.tag-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.tag-note {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 20px;
}

.tag-note h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.tag-note p {
  font-size: 14px;
  color: var(--color-muted);
}

/* CTA 块 */
.cta-block {
  background: var(--color-ink);
  border-radius: var(--radius);
  padding: 56px;
  margin-bottom: var(--space-section);
}

.cta-inner {
  text-align: center;
}

.cta-inner h2 {
  color: var(--color-white);
  font-size: 26px;
  margin-bottom: 12px;
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 16px;
  margin-bottom: 28px;
}

/* ---------------------------------------------------------
   Pages — 制作流程 process
   --------------------------------------------------------- */

.phase-timeline {
  margin-bottom: var(--space-section);
}

.timeline-list {
  position: relative;
  padding-left: 0;
}

.phase-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-line);
}

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

.phase-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-ink);
  color: var(--color-white);
  font-size: 20px;
  font-weight: 700;
}

.phase-content h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.phase-content p {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 6px;
  max-width: 720px;
}

/* 交付清单 */
.deliverables {
  margin-bottom: var(--space-section);
}

.deliverable-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.deliverable-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.deliverable-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: var(--color-accent);
}

.deliverable-card p {
  font-size: 14px;
  color: var(--color-muted);
}

/* 协作方式 */
.collaboration {
  margin-bottom: var(--space-section);
}

.work-mode-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.work-mode {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
}

.work-mode h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.work-mode p {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 8px;
}

/* 场景图库 */
.scene-gallery {
  margin-bottom: var(--space-section);
}

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

.scene-figure {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.scene-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scene-figure figcaption {
  padding-top: 10px;
}

/* 下一步 */
.next-panel {
  background: var(--color-paper-deep);
  border-radius: var(--radius);
  padding: 48px;
  margin-bottom: var(--space-section);
}

.next-inner {
  text-align: center;
}

.next-inner p {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 24px;
}

/* ---------------------------------------------------------
   Pages — 合作申请 cooperation
   --------------------------------------------------------- */

.need-filter {
  margin-bottom: var(--space-section);
}

.need-desc {
  margin-top: 24px;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.need-desc p {
  font-size: 15px;
  color: var(--color-text);
}

/* 合作步骤 */
.coop-step-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.coop-step {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 14px;
}

.coop-step h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.coop-step p {
  font-size: 13px;
  color: var(--color-muted);
}

/* 团队协作 */
.role-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.role-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
}

.role-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--color-accent);
}

.role-card p {
  font-size: 15px;
  color: var(--color-muted);
}

/* 联系说明 */
.contact-note {
  background: var(--color-paper-deep);
  border-radius: var(--radius);
  padding: 32px;
}

.contact-note h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.contact-note p {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 8px;
}

/* ---------------------------------------------------------
   Pages — 关于我们 about
   --------------------------------------------------------- */

.brand-story {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  margin-bottom: var(--space-section);
}

.brand-copy h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.brand-copy p {
  font-size: 16px;
  color: var(--color-muted);
  margin-bottom: 12px;
  line-height: 1.7;
}

.brand-media figure {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.brand-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 创作原则 */
.principles {
  margin-bottom: var(--space-section);
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.principle-item {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  border-top: 3px solid var(--color-accent);
}

.principle-item h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.principle-item p {
  font-size: 14px;
  color: var(--color-muted);
}

/* 团队协作 */
.team-collab {
  margin-bottom: var(--space-section);
}

.section-intro {
  font-size: 16px;
  color: var(--color-muted);
  margin-bottom: 28px;
  max-width: 640px;
}

.collab-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.collab-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
}

.collab-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--color-accent);
}

.collab-card p {
  font-size: 15px;
  color: var(--color-muted);
}

/* ---------------------------------------------------------
   Pages — 常见问题 faq
   --------------------------------------------------------- */

.faq-categories {
  display: flex;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.faq-cat {
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid var(--color-line);
  background: var(--color-white);
  color: var(--color-text);
  transition: background 0.2s ease, color 0.2s ease,
    border-color 0.2s ease;
}

.faq-cat.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
}

.faq-list {
  margin-bottom: 48px;
}

/* 咨询面板 */
.consult-panel {
  background: var(--color-ink);
  border-radius: var(--radius);
  padding: 48px;
  margin-bottom: var(--space-section);
}

.consult-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.consult-copy h2 {
  color: var(--color-white);
  font-size: 24px;
  margin-bottom: 8px;
}

.consult-copy p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 16px;
}

.btn-consult {
  flex-shrink: 0;
}

/* ---------------------------------------------------------
   Pages — 404
   --------------------------------------------------------- */

.error-main {
  padding-top: 80px;
  padding-bottom: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.error-panel {
  text-align: center;
  max-width: 560px;
}

.error-code {
  font-size: 96px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-muted);
  margin-bottom: 32px;
}

.error-panel .btn {
  margin: 0 8px 8px;
}

/* ---------------------------------------------------------
   Responsive — 响应式断点
   --------------------------------------------------------- */

/* ---------- 1024px ---------- */
@media (max-width: 1024px) {
  :root {
    --space-section: 72px;
  }

  .hero-inner {
    gap: 40px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .process-steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-steps .step-item:nth-child(4),
  .process-steps .step-item:nth-child(5) {
    margin-top: 0;
  }

  .coop-step-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .principles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .tag-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- 768px 移动端 ---------- */
@media (max-width: 768px) {
  :root {
    --header-h: 64px;
    --space-section: 56px;
    --space-section-sm: 48px;
  }

  /* 页头 */
  .header-inner {
    height: var(--header-h);
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-tagline {
    font-size: 11px;
  }

  /* 导航切换 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-ink);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    padding: 12px 24px 20px;
    gap: 4px;
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-link {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: var(--radius-sm);
  }

  .btn-nav {
    display: none;
  }

  /* 面包屑 */
  .inner-main {
    padding-top: 24px;
  }

  .breadcrumb {
    margin-bottom: 20px;
    font-size: 13px;
  }

  /* 页面标题 */
  .page-title {
    font-size: 28px;
  }

  .page-title-area p,
  .page-title-block p,
  .page-title p {
    font-size: 15px;
    margin-bottom: 24px;
  }

  /* Hero */
  .hero {
    padding: 48px 0;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  /* 问题对照 */
  .issues-services .section-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* 服务卡片 */
  .service-card-grid,
  .service-grid,
  .delivery-grid,
  .related-grid,
  .role-grid,
  .collab-grid {
    grid-template-columns: 1fr;
  }

  /* 流程 */
  .process-steps {
    grid-template-columns: 1fr;
  }

  /* 案例 */
  .case-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* 场景 */
  .scenario-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .scenario-media {
    position: static;
    grid-template-columns: repeat(3, 1fr);
  }

  /* 案例项目 */
  .project-list {
    grid-template-columns: 1fr;
  }

  /* 交付 */
  .deliverable-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* 协作 */
  .work-mode-list {
    grid-template-columns: 1fr;
  }

  /* 场景图 */
  .scene-grid {
    grid-template-columns: 1fr;
  }

  /* 合作步骤 */
  .coop-step-list {
    grid-template-columns: 1fr 1fr;
  }

  /* 品牌故事 */
  .brand-story {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* CTA */
  .cta-panel,
  .cta-block,
  .next-panel,
  .consult-panel {
    padding: 32px 24px;
  }

  .cta-panel {
    flex-direction: column;
    text-align: center;
  }

  .consult-inner {
    flex-direction: column;
    text-align: center;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding-top: 40px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  /* 相关链接 */
  .related-links {
    padding-bottom: 32px;
  }
}

/* ---------- 480px 小屏手机 ---------- */
@media (max-width: 480px) {
  :root {
    --container-pad: 16px;
  }

  .hero h1 {
    font-size: 28px;
  }

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

  .deliverable-grid,
  .coop-step-list,
  .principles-grid,
  .tag-list {
    grid-template-columns: 1fr;
  }

  .scenario-media {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    grid-column: auto;
  }

  .page-title {
    font-size: 26px;
  }

  .filter-group {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .filter-btn,
  .need-btn {
    flex-shrink: 0;
  }

  .error-code {
    font-size: 72px;
  }

  .error-panel .btn {
    display: block;
    width: 100%;
    margin: 8px 0;
  }
}