/**
 * 郑东星亿美牙口腔门诊 — 官方网站（纯静态）
 * 官方域名：https://fanxingshe.com
 * 内容范围：牙齿贴面科普 · 医疗合规展示
 */

:root {
  --color-primary: #2d5a87;
  --color-primary-dark: #1e4468;
  --color-accent: #3d7ab5;
  --color-text: #1a2332;
  --color-text-muted: #5a6578;
  --color-bg: #f4f7fb;
  --color-card: #ffffff;
  --color-border: rgba(30, 68, 104, 0.12);
  --color-warning-bg: #fff8e6;
  --color-warning-border: #e6c200;
  --shadow-card: 0 10px 36px rgba(26, 35, 50, 0.06);
  --radius-lg: 16px;
  --radius-md: 10px;
  --maxw: 1080px;
  --font-sans: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background: var(--color-bg);
}

.bg-pattern {
  position: fixed;
  inset: 0;
  z-index: -3;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  opacity: 0.4;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(900px 480px at 0% -5%, rgba(45, 90, 135, 0.08), transparent 55%),
    radial-gradient(700px 400px at 100% 0%, rgba(255, 255, 255, 0.85), transparent 50%);
}

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

a {
  color: var(--color-primary-dark);
  text-underline-offset: 3px;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--color-card);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  z-index: 100;
  box-shadow: var(--shadow-card);
}

.skip-link:focus {
  left: 12px;
}

/* —— 顶栏 —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.7rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--color-text);
  line-height: 1.3;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: contain;
  flex-shrink: 0;
  background: rgba(45, 90, 135, 0.06);
  border: 1px solid var(--color-border);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand strong {
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.brand small {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.nav-toggle {
  display: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
  align-items: center;
  justify-content: flex-end;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: rgba(45, 90, 135, 0.1);
  color: var(--color-text);
}

.site-nav a[aria-current="page"] {
  font-weight: 600;
}

/* —— 主内容 —— */
main {
  flex: 1;
  width: 100%;
}

.main-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.25rem 2.5rem;
}

/* 子页面（无 .main-inner）保持原有内容区宽度 */
main:has(.page-header) {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.25rem 2.5rem;
}

.page-header {
  padding: 2rem 0 1.25rem;
}

.page-header h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.3;
  margin: 0 0 0.75rem;
}

.page-header .lead {
  margin: 0;
  color: var(--color-text-muted);
  max-width: 65ch;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.breadcrumb li + li::before {
  content: "›";
  margin-right: 0.35rem;
  color: var(--color-text-muted);
}

.section {
  padding: 1.75rem 0;
}

.section-title {
  font-size: 1.35rem;
  margin: 0 0 0.5rem;
}

.section-subtitle {
  margin: 0 0 1rem;
  color: var(--color-text-muted);
  font-size: 1rem;
}

.section-desc {
  margin: 0 0 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 70ch;
}

.section-link {
  margin: 1.25rem 0 0;
  font-size: 0.95rem;
}

.section-alt {
  margin-left: calc(-1 * ((100vw - min(100vw, var(--maxw))) / 2 + 1.25rem));
  margin-right: calc(-1 * ((100vw - min(100vw, var(--maxw))) / 2 + 1.25rem));
  padding-left: calc((100vw - min(100vw, var(--maxw))) / 2 + 1.25rem);
  padding-right: calc((100vw - min(100vw, var(--maxw))) / 2 + 1.25rem);
  background: rgba(255, 255, 255, 0.55);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

/* —— Hero 首屏 —— */
.hero {
  position: relative;
  min-height: clamp(320px, 52vh, 520px);
  display: flex;
  align-items: center;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

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

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

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(26, 35, 50, 0.72) 0%, rgba(45, 90, 135, 0.45) 55%, rgba(45, 90, 135, 0.2) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3rem 1.25rem;
  color: #fff;
}

.hero-content .org-badge {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.hero-content h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin: 0 0 0.5rem;
  line-height: 1.25;
}

.hero-slogan {
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 600;
  margin: 0 0 0.75rem;
  opacity: 0.95;
}

.hero-lead {
  max-width: 52ch;
  margin: 0 0 1.25rem;
  font-size: 0.98rem;
  line-height: 1.7;
  opacity: 0.92;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.hero-actions .btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
}

.hero-actions .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
}

/* —— 图片占位与网格 —— */
.img-placeholder {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: linear-gradient(145deg, #e8eef5 0%, #f7fafc 100%);
  border: 1px dashed rgba(45, 90, 135, 0.25);
  box-shadow: var(--shadow-card);
}

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

.img-placeholder.is-missing img {
  display: none;
}

.img-placeholder.is-missing::before {
  content: "待上传图片";
  position: absolute;
  top: 38%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

.img-placeholder.is-missing::after {
  content: attr(data-filename);
  position: absolute;
  top: 52%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.72rem;
  color: var(--color-text-muted);
  max-width: 90%;
  text-align: center;
  word-break: break-all;
}

.media-card {
  margin: 0;
}

.media-card figcaption {
  margin-top: 0.55rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  text-align: center;
}

.media-grid {
  display: grid;
  gap: 1rem;
}

.media-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.25rem;
  align-items: start;
}

.intro-text {
  margin: 0;
}

.intro-media .img-placeholder {
  aspect-ratio: 4 / 3;
}

/* —— 产品卡片 —— */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.product-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(26, 35, 50, 0.1);
}

.product-img {
  border-radius: 0;
  border: 0;
  box-shadow: none;
  aspect-ratio: 4 / 3;
}

.product-body {
  padding: 1.15rem 1.25rem 1.35rem;
}

.product-body h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.product-body p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.product-notice {
  margin: 1.25rem 0 0;
  padding: 0.85rem 1rem;
  background: rgba(45, 90, 135, 0.06);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

/* —— 技术优势 —— */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.advantage-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.15rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease;
}

.advantage-card:hover {
  box-shadow: 0 12px 36px rgba(26, 35, 50, 0.08);
}

.advantage-img {
  margin-bottom: 0.85rem;
  aspect-ratio: 3 / 2;
}

.advantage-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.advantage-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* —— 品牌 Logo 墙 —— */
.brand-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.brand-item {
  margin: 0;
  text-align: center;
}

.brand-logo-slot {
  aspect-ratio: 2 / 1;
  background: #fff;
}

.brand-item figcaption {
  margin-top: 0.45rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* —— 案例科普 —— */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.case-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.case-img {
  border-radius: 0;
  border: 0;
  box-shadow: none;
}

.case-body {
  padding: 1.15rem 1.25rem 1.35rem;
}

.case-body-full {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.case-body h3 {
  margin: 0 0 0.65rem;
  font-size: 1.05rem;
}

.case-body p {
  margin: 0 0 0.75rem;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.mini-article-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  flex: 1;
}

.mini-article-list li {
  border-bottom: 1px solid var(--color-border);
  padding: 0.55rem 0;
}

.mini-article-list li:last-child {
  border-bottom: 0;
}

.mini-article-list a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
}

/* —— 联系区 —— */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  align-items: start;
}

.contact-info {
  margin: 0;
}

.map-slot {
  aspect-ratio: 2 / 1;
}

.img-placeholder.cert-img {
  aspect-ratio: 3 / 4;
  max-width: 420px;
  margin: 0 auto;
  background: #fff;
}

.img-placeholder.cert-img img {
  object-fit: contain;
}

/* —— 页脚链接 —— */
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin: 0.75rem 0 0;
}

.footer-links a {
  font-size: 0.88rem;
  text-decoration: none;
  font-weight: 600;
}

.footer-links a[aria-current="page"] {
  color: var(--color-text);
}

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 1.35rem 1.5rem;
}

.card + .card {
  margin-top: 1rem;
}

.card h2,
.card h3 {
  margin-top: 0;
}

.card p:last-child {
  margin-bottom: 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.article-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.article-list li {
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
}

.article-list li:last-child {
  border-bottom: 0;
}

.article-list a {
  font-weight: 600;
  text-decoration: none;
  font-size: 1.05rem;
}

.article-list p {
  margin: 0.35rem 0 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* 文章正文 */
.article-body h2 {
  font-size: 1.2rem;
  margin: 2rem 0 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border);
}

.article-body h2:first-of-type {
  border-top: 0;
  margin-top: 1.25rem;
  padding-top: 0;
}

.article-intro {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  border-left: 4px solid var(--color-primary);
  padding-left: 1rem;
  margin: 0 0 1.5rem;
}

.point-list {
  margin: 0.5rem 0 1rem;
  padding-left: 1.25rem;
}

.point-list li {
  margin-bottom: 0.5rem;
}

.point-list li strong {
  color: var(--color-text);
}

/* FAQ */
.faq-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.faq-list details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 0.65rem;
  background: var(--color-card);
}

.faq-list summary {
  padding: 0.85rem 1rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

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

.faq-list details[open] summary {
  border-bottom: 1px solid var(--color-border);
}

.faq-answer {
  padding: 0.85rem 1rem 1rem;
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* 合规提示 */
.compliance-banner {
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.compliance-banner strong {
  display: block;
  margin-bottom: 0.25rem;
}

.compliance-statement {
  border-left: 4px solid var(--color-primary);
  background: rgba(45, 90, 135, 0.06);
  padding: 1rem 1.15rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-top: 2rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.org-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-primary-dark);
  background: rgba(45, 90, 135, 0.1);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary-dark));
  color: #fff;
}

.btn-primary:hover {
  color: #fff;
  filter: brightness(1.05);
}

.btn-ghost {
  background: #fff;
  border-color: var(--color-border);
  color: var(--color-text);
}

.meta-dl {
  margin: 0;
}

.meta-dl dt {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-top: 0.85rem;
}

.meta-dl dt:first-child {
  margin-top: 0;
}

.meta-dl dd {
  margin: 0.2rem 0 0;
}

/* —— 页脚（全站固定信息） —— */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.97);
  padding: 1.75rem 1.25rem 2rem;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
}

.footer-org-title {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
}

.footer-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem 1.5rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-meta li strong {
  color: var(--color-text);
  font-weight: 600;
}

.footer-mandatory {
  margin: 1rem 0 0;
  padding: 0.75rem 1rem;
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.55;
}

.footer-disclaimer {
  margin: 1rem 0 0;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--color-border);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.footer-copy {
  margin: 0.5rem 0 0;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  text-align: center;
}

.footer-summary {
  margin: 1rem 0 0;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--color-border);
  font-size: 0.84rem;
  color: var(--color-text);
  line-height: 1.6;
  text-align: center;
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .footer-meta,
  .intro-grid,
  .media-grid-3,
  .product-grid,
  .advantage-grid,
  .brand-grid,
  .cases-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .site-nav {
    width: 100%;
    justify-content: flex-start;
  }

  .brand small {
    display: none;
  }
}