/* ==========================================================================
   51每日大赛 - 整站样式表
   版本 v1.0
   目录：
   1. Base（重置、变量、全局）
   2. Layout（页头、页脚、主容器、面包屑）
   3. Components（按钮、卡片、折叠、表格等）
   4. Pages（首页及内页专属模块）
   5. Responsive（768px / 430px 断点）
   ========================================================================== */

/* ==========================================================================
   1. Base
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1e293b;
  background-color: #f7faf8;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: #0f766e;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #14b8a6;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5 {
  line-height: 1.3;
  color: #1e293b;
  font-weight: 600;
}

h1 {
  font-size: 30px;
}

h2 {
  font-size: 23px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 12px;
}

/* ==========================================================================
   2. Layout
   ========================================================================== */

/* ---------- 页头 ---------- */

.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid #e2e8f0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  font-size: 20px;
  font-weight: 700;
  color: #0f766e;
  letter-spacing: 0;
}

.brand-link:hover {
  color: #0f766e;
}

.brand-name {
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #1e293b;
  border-radius: 2px;
}

.site-nav {
  display: block;
}

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

.nav-list li {
  position: relative;
}

.nav-list a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: #475569;
  border-bottom: 2px solid transparent;
  line-height: 1.4;
}

.nav-list a:hover {
  color: #0f766e;
  border-bottom-color: #14b8a6;
}

.nav-list a.is-current {
  color: #0f766e;
  border-bottom-color: #0f766e;
  font-weight: 500;
}

/* ---------- 页脚 ---------- */

.site-footer {
  background-color: #ffffff;
  border-top: 1px solid #e2e8f0;
  margin-top: 64px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 600;
  color: #0f766e;
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 14px;
  color: #64748b;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 12px;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul a {
  font-size: 14px;
  color: #64748b;
}

.footer-col ul a:hover {
  color: #0f766e;
}

.footer-meta {
  grid-column: 1 / -1;
  padding-top: 24px;
  border-top: 1px solid #e2e8f0;
}

.footer-meta p {
  font-size: 13px;
  color: #94a3b8;
  margin-bottom: 4px;
}

/* ---------- 主容器 ---------- */

.site-main {
  min-height: 60vh;
}

.home-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.inner-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 面包屑 ---------- */

.breadcrumb {
  padding: 20px 0 4px;
  font-size: 14px;
  color: #64748b;
}

.breadcrumb a {
  color: #0f766e;
}

.breadcrumb a:hover {
  color: #14b8a6;
}

.breadcrumb-sep {
  margin: 0 8px;
  color: #94a3b8;
}

.breadcrumb-current {
  color: #64748b;
}

/* ---------- 页面标题区 ---------- */

.page-header {
  padding: 28px 0 32px;
}

.page-title {
  font-size: 30px;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: #475569;
  max-width: 780px;
  line-height: 1.7;
}

/* ==========================================================================
   3. Components
   ========================================================================== */

/* ---------- 按钮 ---------- */

.btn-primary,
.btn-secondary,
.btn-light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background-color: #0f766e;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #115e59;
  color: #ffffff;
}

.btn-secondary {
  background-color: #ffffff;
  color: #0f766e;
  border-color: #0f766e;
}

.btn-secondary:hover {
  background-color: #f0fdfa;
  color: #0f766e;
}

.btn-light {
  background-color: #ffffff;
  color: #0f766e;
}

.btn-light:hover {
  background-color: #f0fdfa;
  color: #0f766e;
}

/* ---------- 通用文本链接 ---------- */

.text-link {
  display: inline-flex;
  align-items: center;
  font-size: 15px;
  color: #0f766e;
  font-weight: 500;
  padding: 6px 0;
}

.text-link:hover {
  color: #14b8a6;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  font-size: 15px;
  color: #0f766e;
  font-weight: 500;
}

.link-arrow:hover {
  color: #14b8a6;
}

/* ---------- 折叠面板 ---------- */

.faq-item {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  margin-bottom: 12px;
  padding: 0;
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  outline: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  top: 18px;
  right: 20px;
  font-size: 22px;
  color: #0f766e;
  font-weight: 400;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  background-color: #f8fafc;
}

.faq-item .faq-question {
  font-size: 16px;
  font-weight: 600;
  color: #1e293b;
  padding-right: 32px;
}

.faq-item .faq-answer {
  font-size: 15px;
  color: #475569;
  line-height: 1.6;
}

.faq-item .faq-detail {
  padding: 0 20px 18px;
  font-size: 15px;
  color: #475569;
  line-height: 1.7;
}

.faq-item .faq-detail a {
  color: #0f766e;
  text-decoration: underline;
}

/* ---------- 表格 ---------- */

.responsibility-table {
  width: 100%;
  border-collapse: collapse;
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  overflow: hidden;
}

.responsibility-table th,
.responsibility-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid #e2e8f0;
  font-size: 15px;
  vertical-align: top;
}

.responsibility-table thead th {
  background-color: #f0fdfa;
  color: #0f766e;
  font-weight: 600;
  font-size: 15px;
}

.responsibility-table tbody tr:last-child th,
.responsibility-table tbody tr:last-child td {
  border-bottom: none;
}

.responsibility-table tbody th {
  color: #1e293b;
  font-weight: 600;
  white-space: nowrap;
}

.responsibility-table td {
  color: #475569;
}

/* ---------- 相关链接导航 ---------- */

.related-links {
  margin-top: 40px;
  padding: 20px 24px;
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-label {
  font-size: 15px;
  font-weight: 600;
  color: #1e293b;
  margin-right: 8px;
}

.related-links-item {
  display: inline-block;
  padding: 6px 16px;
  background-color: #f0fdfa;
  color: #0f766e;
  border-radius: 4px;
  font-size: 14px;
  border: 1px solid #ccfbf1;
}

.related-links-item:hover {
  background-color: #ccfbf1;
  color: #0f766e;
}

/* ---------- 图片容器 ---------- */

figure {
  margin: 0;
}

figcaption {
  font-size: 13px;
  color: #64748b;
  padding-top: 8px;
  line-height: 1.5;
}

/* ==========================================================================
   4. Pages
   ========================================================================== */

/* ===================== 首页 ===================== */

/* ---------- Hero 区 ---------- */

.hero-section {
  padding: 56px 0 48px;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-copy h1 {
  font-size: 32px;
  font-weight: 700;
  color: #1e293b;
  line-height: 1.35;
  margin-bottom: 16px;
}

.hero-sub {
  font-size: 17px;
  color: #475569;
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-media img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: 8px;
}

.content-media-primary {
  margin: 48px 0 0;
}

.content-media-primary img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: 8px;
}

.content-media-primary figcaption {
  text-align: center;
}

/* ---------- 服务摘要条带 ---------- */

.services-summary {
  padding: 48px 0;
}

.section-heading {
  margin-bottom: 28px;
}

.section-heading h2 {
  font-size: 24px;
  color: #1e293b;
  margin-bottom: 8px;
}

.section-heading p {
  font-size: 16px;
  color: #64748b;
  max-width: 640px;
}

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

.summary-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}

.summary-card h3 {
  font-size: 18px;
  color: #0f766e;
  margin-bottom: 10px;
}

.summary-card p {
  font-size: 15px;
  color: #475569;
  line-height: 1.65;
  margin-bottom: 16px;
  flex-grow: 1;
}

.summary-card a {
  font-size: 14px;
  color: #0f766e;
  font-weight: 500;
}

.summary-card a:hover {
  color: #14b8a6;
}

/* ---------- 赛程样例区 ---------- */

.sample-area {
  padding: 48px 0;
}

.sample-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: start;
}

.timeline-preview h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

.timeline-simple {
  margin-bottom: 16px;
}

.timeline-simple li {
  position: relative;
  padding: 0 0 20px 28px;
  border-left: 2px solid #ccfbf1;
}

.timeline-simple li:last-child {
  padding-bottom: 4px;
  border-left-color: transparent;
}

.timeline-simple li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: #0f766e;
  border: 2px solid #ffffff;
  box-shadow: 0 0 0 2px #14b8a6;
}

.step-label {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 4px;
}

.step-desc {
  display: block;
  font-size: 14px;
  color: #64748b;
  line-height: 1.55;
}

.entry-cards {
  display: grid;
  gap: 16px;
}

.entry-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 24px;
  display: block;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.entry-card:hover {
  border-color: #14b8a6;
  box-shadow: 0 2px 12px rgba(15, 118, 110, 0.08);
}

.entry-card h3 {
  font-size: 18px;
  color: #0f766e;
  margin-bottom: 8px;
}

.entry-card p {
  font-size: 14px;
  color: #64748b;
  line-height: 1.6;
  margin-bottom: 12px;
}

.card-link {
  font-size: 14px;
  font-weight: 500;
  color: #0f766e;
}

.entry-card:hover .card-link {
  color: #14b8a6;
}

/* ---------- 参与准备与 FAQ 双栏 ---------- */

.prep-faq-section {
  padding: 48px 0;
}

.double-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.prep-summary h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

.prep-list {
  margin-bottom: 16px;
}

.prep-list li {
  position: relative;
  padding: 10px 0 10px 28px;
  font-size: 15px;
  color: #475569;
  border-bottom: 1px solid #e2e8f0;
}

.prep-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 18px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #14b8a6;
}

.faq-teaser h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

/* ---------- 合作与反馈入口条 ---------- */

.contact-banner {
  margin: 48px 0 24px;
  background-color: #f0fdfa;
  border: 1px solid #ccfbf1;
  border-radius: 8px;
  padding: 36px 40px;
}

.banner-content h2 {
  font-size: 24px;
  color: #0f766e;
  margin-bottom: 8px;
}

.banner-content p {
  font-size: 16px;
  color: #475569;
  margin-bottom: 20px;
}

.banner-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ===================== 服务目录页 ===================== */

.service-list {
  padding-bottom: 48px;
}

.section-title {
  font-size: 24px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid #ccfbf1;
}

.service-item {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 32px;
  align-items: center;
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 32px;
  margin-bottom: 24px;
}

.service-text h3 {
  font-size: 20px;
  color: #0f766e;
  margin-bottom: 12px;
}

.service-text p {
  font-size: 15px;
  color: #475569;
  line-height: 1.7;
  margin-bottom: 10px;
}

.service-text a {
  display: inline-block;
  margin-top: 8px;
  font-size: 14px;
  color: #0f766e;
  font-weight: 500;
}

.service-text a:hover {
  color: #14b8a6;
}

.service-media img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 6px;
}

.service-media figcaption {
  font-size: 13px;
  color: #64748b;
  padding-top: 8px;
}

/* ---------- 服务模式边界 ---------- */

.service-boundaries {
  padding: 32px 0;
}

.service-boundaries .section-title {
  margin-bottom: 12px;
}

.section-intro {
  font-size: 15px;
  color: #64748b;
  margin-bottom: 24px;
  max-width: 720px;
}

.boundary-list {
  margin-bottom: 24px;
}

.boundary-list li {
  position: relative;
  padding: 12px 0 12px 32px;
  font-size: 15px;
  color: #475569;
  border-bottom: 1px solid #e2e8f0;
  line-height: 1.65;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 20px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #14b8a6;
}

.boundary-list strong {
  display: block;
  color: #1e293b;
  font-weight: 600;
  margin-bottom: 2px;
}

.boundary-note {
  font-size: 15px;
  color: #64748b;
  background-color: #f8fafc;
  border-left: 3px solid #14b8a6;
  padding: 16px 20px;
  border-radius: 0 6px 6px 0;
}

.boundary-note a {
  color: #0f766e;
  text-decoration: underline;
}

/* ---------- 服务指引 ---------- */

.service-guide {
  margin-top: 40px;
  padding: 24px;
  background-color: #f0fdfa;
  border: 1px solid #ccfbf1;
  border-radius: 6px;
}

.service-guide p {
  font-size: 15px;
  color: #475569;
  margin-bottom: 12px;
}

.service-guide a {
  display: inline-block;
  margin-right: 16px;
  font-size: 14px;
  color: #0f766e;
  font-weight: 500;
}

.service-guide a:hover {
  color: #14b8a6;
}

/* ===================== 项目流程页 ===================== */

.process-hero-figure {
  margin-bottom: 40px;
}

.process-hero-figure img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: 8px;
}

.process-hero-figure figcaption {
  text-align: center;
}

/* ---------- 流程时间线 ---------- */

.process-timeline {
  padding: 32px 0 48px;
}

.process-timeline h2 {
  font-size: 24px;
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 2px solid #ccfbf1;
}

.timeline-step {
  position: relative;
  padding: 0 0 36px 56px;
  border-left: 2px solid #ccfbf1;
}

.timeline-step:last-child {
  padding-bottom: 8px;
  border-left-color: transparent;
}

.timeline-step .step-number {
  position: absolute;
  left: -18px;
  top: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background-color: #0f766e;
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 2px #14b8a6;
}

.timeline-step .step-content h3 {
  font-size: 18px;
  color: #0f766e;
  margin-bottom: 8px;
}

.timeline-step .step-content p {
  font-size: 15px;
  color: #475569;
  line-height: 1.7;
  margin-bottom: 8px;
}

.timeline-step .step-output {
  font-size: 14px;
  color: #64748b;
  background-color: #f8fafc;
  border-left: 3px solid #14b8a6;
  padding: 10px 16px;
  border-radius: 0 4px 4px 0;
  display: inline-block;
}

/* ---------- 职责对照表 ---------- */

.responsibility-table-section {
  padding: 32px 0;
}

.responsibility-table-section h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.responsibility-table-section > p {
  font-size: 15px;
  color: #64748b;
  margin-bottom: 20px;
}

/* ---------- 流程页链接 ---------- */

.process-links {
  margin-top: 40px;
  padding: 24px;
  background-color: #f0fdfa;
  border: 1px solid #ccfbf1;
  border-radius: 6px;
}

.process-links p {
  font-size: 15px;
  color: #475569;
  margin-bottom: 12px;
}

.process-links a {
  display: inline-block;
  margin-right: 16px;
  font-size: 14px;
  color: #0f766e;
  font-weight: 500;
}

.process-links a:hover {
  color: #14b8a6;
}

/* ===================== 参与准备页 ===================== */

.prepare-section {
  padding-bottom: 48px;
}

.prepare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.checklist-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 28px 24px;
}

.checklist-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.checklist-icon {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  background-color: #f0fdfa;
  border: 1px solid #ccfbf1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #0f766e;
}

.checklist-title {
  font-size: 20px;
  color: #0f766e;
}

.checklist-desc {
  font-size: 15px;
  color: #64748b;
  margin-bottom: 20px;
}

.checklist-list li {
  padding: 14px 0;
  border-bottom: 1px solid #e2e8f0;
}

.checklist-list li:last-child {
  border-bottom: none;
}

.checklist-list h3 {
  font-size: 16px;
  color: #1e293b;
  margin-bottom: 4px;
}

.checklist-list p {
  font-size: 14px;
  color: #64748b;
  line-height: 1.6;
  margin-bottom: 0;
}

/* ---------- 配图区 ---------- */

.prepare-media {
  padding: 32px 0;
}

.prepare-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: 8px;
}

.prepare-figure figcaption {
  text-align: center;
}

/* ---------- 下一步提示条 ---------- */

.next-step-bar {
  margin: 32px 0;
  padding: 28px 32px;
  background-color: #f0fdfa;
  border: 1px solid #ccfbf1;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.next-step-bar p {
  font-size: 16px;
  color: #1e293b;
  margin-bottom: 0;
}

.next-step-bar .link-arrow {
  white-space: nowrap;
}

/* ===================== 服务说明页 ===================== */

.notice-section {
  padding-bottom: 40px;
}

.notice-section h2 {
  font-size: 24px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid #ccfbf1;
}

.section-lead {
  font-size: 15px;
  color: #64748b;
  margin-bottom: 24px;
  max-width: 720px;
}

.notice-list {
  counter-reset: notice-counter;
}

.notice-item {
  position: relative;
  padding: 16px 0 16px 48px;
  border-bottom: 1px solid #e2e8f0;
  counter-increment: notice-counter;
}

.notice-item::before {
  content: counter(notice-counter);
  position: absolute;
  left: 0;
  top: 18px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: #f0fdfa;
  border: 1px solid #ccfbf1;
  color: #0f766e;
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.notice-item h3 {
  font-size: 16px;
  color: #1e293b;
  margin-bottom: 6px;
}

.notice-item p {
  font-size: 15px;
  color: #475569;
  line-height: 1.65;
  margin-bottom: 0;
}

/* ---------- 配图 ---------- */

.notice-figure {
  padding: 24px 0;
}

.notice-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: 8px;
}

.notice-figure figcaption {
  text-align: center;
}

/* ---------- 相关页面导航 ---------- */

.notice-related {
  margin-top: 32px;
  padding: 28px 32px;
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
}

.notice-related h2 {
  font-size: 18px;
  color: #0f766e;
  margin-bottom: 8px;
}

.notice-related p {
  font-size: 15px;
  color: #475569;
  margin-bottom: 16px;
}

.notice-related .related-links li {
  margin-bottom: 8px;
}

.notice-related .related-links a {
  font-size: 15px;
  color: #0f766e;
}

.notice-related .related-links a:hover {
  color: #14b8a6;
}

/* ===================== 常见问题页 ===================== */

.faq-section {
  padding-bottom: 48px;
}

.faq-section .section-title {
  margin-bottom: 24px;
}

.faq-list {
  max-width: 860px;
}

.faq-list .faq-item {
  position: relative;
}

.faq-list .faq-question {
  font-size: 16px;
  font-weight: 600;
  color: #1e293b;
  padding-right: 32px;
}

.faq-list .faq-answer {
  font-size: 15px;
  color: #475569;
}

.faq-list .faq-detail a {
  color: #0f766e;
  text-decoration: underline;
}

/* ---------- 反馈指引区 ---------- */

.feedback-guide {
  padding: 32px 0;
}

.feedback-guide .section-title {
  margin-bottom: 24px;
}

.feedback-guide-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  align-items: center;
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 28px;
}

.feedback-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 6px;
}

.feedback-figure figcaption {
  font-size: 13px;
  color: #64748b;
  padding-top: 8px;
}

.feedback-text {
  font-size: 15px;
  color: #475569;
  line-height: 1.7;
  margin-bottom: 16px;
}

.feedback-link-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.feedback-link {
  display: inline-block;
  padding: 10px 24px;
  background-color: #f0fdfa;
  border: 1px solid #ccfbf1;
  color: #0f766e;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
}

.feedback-link:hover {
  background-color: #ccfbf1;
  color: #0f766e;
}

/* ===================== 合作与反馈页 ===================== */

.contact-paths {
  padding-bottom: 48px;
}

.contact-paths .section-title {
  margin-bottom: 24px;
}

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

.path-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}

.path-card h3 {
  font-size: 18px;
  color: #0f766e;
  margin-bottom: 10px;
}

.path-card p {
  font-size: 15px;
  color: #475569;
  line-height: 1.65;
  margin-bottom: 16px;
  flex-grow: 1;
}

.path-link {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  padding: 8px 20px;
  background-color: #0f766e;
  color: #ffffff;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  min-height: 40px;
}

.path-link:hover {
  background-color: #115e59;
  color: #ffffff;
}

/* ---------- 反馈与边界双栏 ---------- */

.feedback-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.feedback-card {
  background-color: #f0fdfa;
  border: 1px solid #ccfbf1;
  border-radius: 6px;
  padding: 28px 24px;
}

.feedback-card h3 {
  font-size: 18px;
  color: #0f766e;
  margin-bottom: 8px;
}

.feedback-card p {
  font-size: 15px;
  color: #475569;
  line-height: 1.65;
  margin-bottom: 16px;
}

.feedback-card a {
  font-size: 14px;
  font-weight: 500;
  color: #0f766e;
}

.feedback-card a:hover {
  color: #14b8a6;
}

/* ---------- 配图区 ---------- */

.contact-visual {
  padding: 32px 0;
}

.contact-figure img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: 8px;
}

.contact-figure figcaption {
  text-align: center;
}

/* ===================== 404 页 ===================== */

.error-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.error-panel {
  text-align: center;
  padding: 80px 24px 60px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #0f766e;
  line-height: 1;
  margin-bottom: 16px;
}

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

.error-desc {
  font-size: 16px;
  color: #64748b;
  max-width: 520px;
  margin: 0 auto 28px;
}

.error-home-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 32px;
  background-color: #0f766e;
  color: #ffffff;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 40px;
}

.error-home-btn:hover {
  background-color: #115e59;
  color: #ffffff;
}

.error-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.error-links a {
  font-size: 15px;
  color: #0f766e;
  font-weight: 500;
}

.error-links a:hover {
  color: #14b8a6;
}

/* ==========================================================================
   5. Responsive
   ========================================================================== */

/* ---------- 768px 断点 ---------- */

@media (max-width: 768px) {
  .header-inner {
    height: 56px;
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 0;
  }

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

  .nav-list li {
    border-bottom: 1px solid #f1f5f9;
  }

  .nav-list li:last-child {
    border-bottom: none;
  }

  .nav-list a {
    padding: 14px 8px;
    font-size: 16px;
    border-bottom: none;
  }

  .nav-list a.is-current {
    border-bottom: none;
    color: #0f766e;
    background-color: #f0fdfa;
    border-radius: 4px;
  }

  /* 首页 Hero */
  .hero-section {
    padding: 36px 0 32px;
  }

  .hero-container {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-media img {
    height: 260px;
  }

  .content-media-primary img {
    height: 220px;
  }

  /* 服务摘要 */
  .summary-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .summary-card {
    padding: 22px 20px;
  }

  /* 赛程样例 */
  .sample-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  /* 双栏 */
  .double-column {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  /* 入口条 */
  .contact-banner {
    padding: 28px 24px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 36px 16px 28px;
  }

  .footer-meta {
    grid-column: 1;
  }

  /* 内页 */
  .inner-main {
    padding: 0 16px;
  }

  .breadcrumb {
    padding: 16px 0 0;
  }

  .page-header {
    padding: 20px 0 24px;
  }

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

  /* 服务条目 */
  .service-item {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 24px 20px;
  }

  .service-media img {
    height: 200px;
  }

  /* 时间线 */
  .timeline-step {
    padding-left: 48px;
  }

  .timeline-step .step-number {
    left: -16px;
    width: 30px;
    height: 30px;
    font-size: 14px;
  }

  /* 职责表格 */
  .responsibility-table {
    font-size: 14px;
  }

  .responsibility-table th,
  .responsibility-table td {
    padding: 10px 12px;
    font-size: 14px;
  }

  .responsibility-table tbody th {
    white-space: normal;
  }

  /* 参与准备 */
  .prepare-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* 服务说明 */
  .notice-item {
    padding-left: 44px;
  }

  /* FAQ 反馈 */
  .feedback-guide-inner {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 20px;
  }

  /* 合作路径 */
  .path-cards {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .feedback-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  /* 404 */
  .error-panel {
    padding: 48px 16px 40px;
  }

  .error-code {
    font-size: 56px;
  }
}

/* ---------- 430px 断点 ---------- */

@media (max-width: 430px) {
  body {
    font-size: 15px;
  }

  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 21px;
  }

  .hero-copy h1 {
    font-size: 26px;
  }

  .hero-sub {
    font-size: 15px;
  }

  .hero-cta {
    flex-direction: column;
    gap: 10px;
  }

  .btn-primary,
  .btn-secondary,
  .btn-light {
    width: 100%;
  }

  .hero-media img {
    height: 200px;
  }

  .content-media-primary img {
    height: 180px;
  }

  .sample-area,
  .services-summary,
  .prep-faq-section {
    padding: 32px 0;
  }

  .section-heading h2,
  .timeline-preview h2,
  .prep-summary h2,
  .faq-teaser h2 {
    font-size: 21px;
  }

  .contact-banner {
    padding: 24px 20px;
  }

  .banner-links {
    flex-direction: column;
    gap: 10px;
  }

  .banner-links .btn-light {
    width: 100%;
  }

  .footer-inner {
    padding: 32px 16px 24px;
  }

  .page-title {
    font-size: 24px;
  }

  .page-description {
    font-size: 15px;
  }

  .service-item {
    padding: 20px 16px;
  }

  .service-media img {
    height: 180px;
  }

  .process-hero-figure img {
    height: 200px;
  }

  .timeline-step {
    padding-left: 42px;
  }

  .timeline-step .step-number {
    left: -14px;
    width: 26px;
    height: 26px;
    font-size: 13px;
  }

  .timeline-step .step-content p {
    font-size: 14px;
  }

  .prepare-figure img,
  .notice-figure img,
  .contact-figure img {
    height: 200px;
  }

  .next-step-bar {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
  }

  .related-links {
    padding: 16px;
    gap: 8px;
  }

  .related-links-item {
    font-size: 13px;
    padding: 5px 12px;
  }

  .error-code {
    font-size: 44px;
  }

  .error-panel h1 {
    font-size: 22px;
  }

  .error-links {
    flex-direction: column;
    gap: 12px;
  }
}