/* ===================================================
   北京江艺装饰服务有限公司 - 全站样式
   =================================================== */

:root {
  --color-primary: #1d5ea8;
  --color-primary-dark: #123f78;
  --color-primary-light: #eaf2fb;
  --color-accent: #c9973a;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fb;
  --color-border: #e5e9ef;
  --color-footer-bg: #1c2733;
  --color-footer-text: #b9c3cf;
  --max-width: 1180px;
  --header-height: 88px;
  --topbar-height: 34px;
  --radius: 6px;
  --shadow-sm: 0 2px 8px rgba(20, 40, 70, 0.06);
  --shadow-md: 0 6px 20px rgba(20, 40, 70, 0.12);
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4, p {
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* ---------------------------------------------------
   顶部工具栏
   --------------------------------------------------- */
.topbar {
  background: var(--color-primary-dark);
  color: #cfe0f5;
  font-size: 13px;
  height: var(--topbar-height);
}

.topbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar__welcome {
  opacity: 0.9;
}

.topbar__links {
  display: flex;
  gap: 18px;
}

.topbar__links a,
.topbar__links button {
  background: none;
  border: none;
  color: #cfe0f5;
  font-size: 13px;
  cursor: pointer;
  padding: 0;
  font-family: inherit;
}

.topbar__links a:hover,
.topbar__links button:hover {
  color: #ffffff;
  text-decoration: underline;
}

/* ---------------------------------------------------
   品牌头部
   --------------------------------------------------- */
.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand__mark {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  flex-shrink: 0;
}

.brand__text .brand__name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary-dark);
  white-space: nowrap;
}

.brand__text .brand__slogan {
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 1px;
  margin-top: 2px;
}

.hotline {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.hotline__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.hotline__label {
  font-size: 12px;
  color: var(--color-text-muted);
}

.hotline__number {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.5px;
}

.hotline__number a {
  color: inherit;
}

/* ---------------------------------------------------
   主导航
   --------------------------------------------------- */
.main-nav {
  background: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.main-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-list {
  display: flex;
}

.nav-item {
  position: relative;
}

.nav-item > a {
  display: flex;
  align-items: center;
  height: 52px;
  padding: 0 22px;
  color: #ffffff;
  font-size: 15px;
  font-weight: 500;
  transition: background var(--transition);
  white-space: nowrap;
}

.nav-item > a:hover,
.nav-item.is-active > a {
  background: var(--color-primary-dark);
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background: #ffffff;
  box-shadow: var(--shadow-md);
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 6px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 50;
}

.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: 10px 18px;
  font-size: 14px;
  color: var(--color-text);
}

.nav-dropdown a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  position: relative;
  cursor: pointer;
}

.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  height: 2px;
  background: #ffffff;
  transition: transform var(--transition);
}

.nav-toggle__bar {
  top: 19px;
}

.nav-toggle__bar::before {
  top: -8px;
}

.nav-toggle__bar::after {
  top: 8px;
}

.main-nav.is-open .nav-toggle__bar {
  background: transparent;
}

.main-nav.is-open .nav-toggle__bar::before {
  transform: translateY(8px) rotate(45deg);
  background: #fff;
}

.main-nav.is-open .nav-toggle__bar::after {
  transform: translateY(-8px) rotate(-45deg);
  background: #fff;
}

/* ---------------------------------------------------
   首页横幅
   --------------------------------------------------- */
.hero {
  position: relative;
  background: linear-gradient(120deg, rgba(18, 63, 120, 0.92) 0%, rgba(29, 94, 168, 0.88) 55%, rgba(44, 127, 209, 0.82) 100%),
    url("../assets/render-living-panorama.jpg") center/cover no-repeat;
  color: #fff;
  overflow: hidden;
}

.hero__bg-pattern {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 15% 25%, rgba(255, 255, 255, 0.08) 0, transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(255, 255, 255, 0.08) 0, transparent 45%);
}

.hero .container {
  position: relative;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 60px;
  padding-bottom: 60px;
}

.hero__eyebrow {
  font-size: 14px;
  letter-spacing: 3px;
  color: #cfe0f5;
  margin-bottom: 14px;
}

.hero__title {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.4;
  max-width: 620px;
}

.hero__desc {
  margin-top: 18px;
  font-size: 15px;
  color: #dce8f7;
  max-width: 560px;
}

.hero__actions {
  margin-top: 30px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__note {
  margin-top: 22px;
  font-size: 12px;
  color: #b9cde8;
}

.hero-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}

.hero-dots button {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  padding: 0;
}

.hero-dots button.is-active {
  background: #ffffff;
}

/* ---------------------------------------------------
   通用按钮
   --------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 26px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn-primary {
  background: var(--color-accent);
  color: #1c2733;
}

.btn-primary:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-outline {
  border-color: rgba(255, 255, 255, 0.6);
  color: #ffffff;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn-block {
  width: 100%;
}

/* ---------------------------------------------------
   通用板块
   --------------------------------------------------- */
.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-head {
  text-align: center;
  margin-bottom: 40px;
}

.section-head__eyebrow {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 2px;
}

.section-head__title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-top: 10px;
  position: relative;
  display: inline-block;
  padding-bottom: 14px;
}

.section-head__title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 3px;
  border-radius: 2px;
  background: var(--color-accent);
}

.section-head__title--left {
  text-align: left;
  display: block;
}

.section-head__title--left::after {
  left: 0;
  transform: none;
}

.section-head__desc {
  margin-top: 12px;
  font-size: 14px;
  color: var(--color-text-light);
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.section-foot {
  text-align: center;
  margin-top: 36px;
}

/* 公司简介 */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.about-media {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.about-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: inset 0 0 0 8px rgba(255, 255, 255, 0.06);
  pointer-events: none;
}

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

.about-copy p {
  color: var(--color-text-light);
  font-size: 14px;
  margin-bottom: 14px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.about-stats__item {
  text-align: center;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 8px;
}

.about-stats__num {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
}

.about-stats__label {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.placeholder-note {
  display: inline-block;
  margin-top: 18px;
  font-size: 12px;
  color: var(--color-text-muted);
  background: var(--color-primary-light);
  border-radius: var(--radius);
  padding: 6px 12px;
}

/* 卡片网格：服务/方案/案例/新闻 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.service-card,
.solution-card,
.case-card,
.news-card {
  background: #ffffff;
  border: 1px solid rgba(29, 94, 168, 0.1);
  border-radius: 10px;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: 0 10px 30px rgba(18, 63, 120, 0.05);
}

.service-card:hover,
.solution-card:hover,
.case-card:hover,
.news-card:hover {
  transform: translateY(-4px);
  border-color: rgba(29, 94, 168, 0.18);
  box-shadow: 0 18px 36px rgba(18, 63, 120, 0.14);
}

.service-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin: 22px 22px 0;
}

.service-card__body,
.solution-card__body,
.news-card__body {
  padding: 16px 22px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.service-card__title,
.solution-card__title,
.case-card__title,
.news-card__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.service-card__desc,
.solution-card__desc,
.news-card__desc {
  font-size: 13px;
  color: var(--color-text-light);
  flex: 1;
}

.service-card__link,
.solution-card__link {
  margin-top: 14px;
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 600;
}

.card-media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-bg-alt);
}

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

.solution-card:hover .card-media img,
.case-card:hover .card-media img {
  transform: scale(1.06);
}

.case-card__body {
  padding: 16px 20px 20px;
}

.case-card__tag {
  display: inline-block;
  font-size: 11px;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: 4px;
  padding: 3px 8px;
  margin-bottom: 8px;
}

.news-card__meta {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.news-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px dashed var(--color-border);
}

.news-row:last-child {
  border-bottom: none;
}

.news-row__date {
  width: 64px;
  flex-shrink: 0;
  text-align: center;
  background: var(--color-primary-light);
  border-radius: var(--radius);
  padding: 8px 4px;
  color: var(--color-primary-dark);
}

.news-row__date .day {
  font-size: 20px;
  font-weight: 700;
  display: block;
}

.news-row__date .ym {
  font-size: 11px;
  display: block;
}

.news-row__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.news-row__desc {
  font-size: 13px;
  color: var(--color-text-light);
  margin-top: 4px;
}

.news-row__cat {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--color-primary);
}

/* 留言/联系 CTA */
.cta-band {
  background: linear-gradient(120deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
}

.cta-band .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 40px;
  padding-bottom: 40px;
}

.cta-band__title {
  font-size: 22px;
  font-weight: 700;
}

.cta-band__desc {
  margin-top: 8px;
  font-size: 13px;
  color: #dce8f7;
}

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

/* ---------------------------------------------------
   面包屑 / 页面横幅（内页）
   --------------------------------------------------- */
.page-banner {
  position: relative;
  background: linear-gradient(120deg, #123f78, #1d5ea8);
  color: #fff;
  padding: 46px 0;
  overflow: hidden;
}

.page-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 90% 20%, rgba(255, 255, 255, 0.1) 0, transparent 45%),
    radial-gradient(circle at 10% 90%, rgba(255, 255, 255, 0.08) 0, transparent 40%);
  pointer-events: none;
}

.page-banner .container {
  position: relative;
}

.page-banner__title {
  font-size: 26px;
  font-weight: 700;
}

.breadcrumb {
  margin-top: 10px;
  font-size: 13px;
  color: #cfe0f5;
  display: flex;
  gap: 6px;
}

.breadcrumb a {
  color: #cfe0f5;
}

.breadcrumb a:hover {
  color: #fff;
  text-decoration: underline;
}

/* ---------------------------------------------------
   内页两栏布局
   --------------------------------------------------- */
.inner-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  padding: 48px 0 64px;
  align-items: start;
}

.side-nav {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
}

.side-nav__title {
  background: var(--color-primary);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  padding: 18px 20px;
}

.side-nav__title span {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: #cfe0f5;
  letter-spacing: 2px;
  margin-top: 2px;
}

.side-nav ul {
  padding: 8px;
}

.side-nav li + li {
  margin-top: 4px;
}

.side-nav a {
  display: block;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}

.side-nav a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.side-nav li.is-active a {
  background: var(--color-primary);
  color: #fff;
}

.side-contact {
  margin-top: 20px;
  background: var(--color-primary-light);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}

.side-contact__label {
  font-size: 12px;
  color: var(--color-text-light);
}

.side-contact__number {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin: 6px 0 14px;
}

.inner-content {
  min-width: 0;
}

.inner-content__title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary-dark);
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 24px;
}

.rich-text p {
  color: var(--color-text-light);
  font-size: 14px;
  margin-bottom: 14px;
}

.rich-text h3 {
  font-size: 17px;
  color: var(--color-text);
  margin: 24px 0 12px;
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 8px;
}

.timeline__item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.timeline__num {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.timeline__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}

.timeline__desc {
  font-size: 13px;
  color: var(--color-text-light);
  margin-top: 4px;
}

.culture-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 8px;
}

.culture-item {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 18px;
}

.culture-item__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.culture-item__desc {
  font-size: 13px;
  color: var(--color-text-light);
  margin-top: 6px;
}

.org-chart {
  margin-top: 12px;
  background: var(--color-bg-alt);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
}

.org-chart__level {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.org-chart__box {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px 18px;
  font-size: 13px;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

.org-chart__box--top {
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
}

/* 分类标签（业务范围/新闻/案例筛选） */
.filter-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.filter-tabs button {
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-text-light);
  font-size: 13px;
  padding: 8px 18px;
  border-radius: 20px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  font-family: inherit;
}

.filter-tabs button:hover {
  color: var(--color-primary);
}

.filter-tabs button.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ---------------------------------------------------
   联系我们页面
   --------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-info-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 16px;
}

.contact-info-item__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.contact-info-item__label {
  font-size: 12px;
  color: var(--color-text-muted);
}

.contact-info-item__value {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-top: 2px;
}

.map-placeholder {
  margin-top: 20px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.qrcode-block {
  margin-top: 20px;
  text-align: center;
}

.qrcode-block img {
  width: 130px;
  margin: 0 auto 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.qrcode-block__label {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* 表单 */
.message-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 28px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group--full {
  grid-column: 1 / -1;
}

.form-label {
  font-size: 13px;
  color: var(--color-text);
  font-weight: 600;
}

.form-label .required {
  color: #e0524d;
  margin-left: 2px;
}

.form-control {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 11px 14px;
  font-size: 14px;
  font-family: inherit;
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

.form-error {
  font-size: 12px;
  color: #e0524d;
  min-height: 16px;
}

.form-group.has-error .form-control {
  border-color: #e0524d;
}

.form-footnote {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 4px;
  margin-bottom: 18px;
}

.form-feedback {
  display: none;
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.6;
}

.form-feedback.is-visible {
  display: block;
}

.form-feedback.success {
  background: #e9f7ee;
  color: #1e7a41;
  border: 1px solid #bfe6cc;
}

.form-feedback.error {
  background: #fdeceb;
  color: #b23a34;
  border: 1px solid #f5c6c2;
}

/* ---------------------------------------------------
   浮动联系组件
   --------------------------------------------------- */
.float-widget {
  position: fixed;
  right: 20px;
  bottom: 120px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.float-widget__btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-primary);
  cursor: pointer;
  position: relative;
}

.float-widget__btn:hover {
  background: var(--color-primary);
  color: #fff;
}

.float-widget__btn .tip {
  position: absolute;
  right: 62px;
  top: 50%;
  transform: translateY(-50%);
  background: #1c2733;
  color: #fff;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition);
}

.float-widget__btn:hover .tip {
  opacity: 1;
  visibility: visible;
}

.float-widget__btn.back-top {
  display: none;
}

/* ---------------------------------------------------
   页脚
   --------------------------------------------------- */
.site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 48px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand__name {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
}

.footer-brand__desc {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.8;
  max-width: 260px;
}

.footer-col__title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-col li {
  margin-bottom: 10px;
  font-size: 13px;
}

.footer-col a:hover {
  color: #ffffff;
}

.footer-col--contact li {
  display: flex;
  gap: 8px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 20px 0;
  font-size: 12px;
  color: #8b97a5;
}

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

/* ---------------------------------------------------
   兼容性/工具提示
   --------------------------------------------------- */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  background: #1c2733;
  color: #fff;
  font-size: 13px;
  padding: 12px 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 999;
  max-width: 90%;
  text-align: center;
}

.toast.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ===================================================
   响应式
   =================================================== */
@media (max-width: 1024px) {
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

  .inner-layout {
    grid-template-columns: 200px 1fr;
  }

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

@media (max-width: 768px) {
  :root {
    --header-height: 76px;
  }

  .topbar__welcome {
    display: none;
  }

  .hotline__label {
    display: none;
  }

  .brand__slogan {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .nav-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-primary-dark);
    flex-direction: column;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }

  .main-nav.is-open .nav-list {
    max-height: 80vh;
    overflow-y: auto;
  }

  .nav-item > a {
    height: auto;
    padding: 14px 20px;
  }

  .nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
    box-shadow: none;
    border-radius: 0;
    background: rgba(0, 0, 0, 0.12);
  }

  .nav-item.is-expanded .nav-dropdown {
    display: block;
  }

  .nav-dropdown a {
    color: #dce8f7;
    padding: 10px 34px;
  }

  .nav-dropdown a:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
  }

  .hero__title {
    font-size: 26px;
  }

  .hero .container {
    min-height: 320px;
    padding-top: 40px;
    padding-bottom: 60px;
  }

  .about-grid,
  .card-grid,
  .card-grid--2,
  .culture-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

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

  .side-nav {
    display: none;
  }

  .side-nav.is-mobile-open {
    display: block;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

  .float-widget {
    right: 12px;
    bottom: 90px;
  }

  .float-widget__btn .tip {
    display: none;
  }

  .news-row {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }
}