/* 全景秀官网 - 公共样式 */
:root {
  --brand: #e8625a;
  --brand-dark: #d94a42;
  --brand-soft: #fff1ef;
  --ink: #1d232b;
  --ink-2: #3f4854;
  --sub: #77808f;
  --line: #e9edf2;
  --bg: #f7f8fa;
  --white: #ffffff;
  --shadow: 0 8px 28px rgba(29, 35, 43, 0.07);
  --shadow-lg: 0 18px 50px rgba(29, 35, 43, 0.12);
  --radius: 16px;
  --container: 1200px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
svg,
video {
  max-width: 100%;
  vertical-align: middle;
}

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

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

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
  box-shadow: 0 8px 20px rgba(232, 98, 90, 0.24);
}

.btn:hover {
  color: #fff;
  background: var(--brand-dark);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-ghost {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
  box-shadow: none;
}

.btn-ghost:hover {
  color: var(--brand-dark);
  border-color: #f3b9b4;
  background: #fff;
}

.btn-light {
  background: #fff;
  color: var(--brand-dark);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(233, 237, 242, 0.9);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  min-height: 68px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.brand:hover {
  color: var(--ink);
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  box-shadow: 0 4px 12px rgba(232, 98, 90, 0.28);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 4px;
}

.main-nav a {
  position: relative;
  display: block;
  padding: 24px 14px;
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 17px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}

.main-nav a:hover,
.main-nav a.is-active {
  color: var(--brand-dark);
}

.main-nav a.is-active::after,
.main-nav a:hover::after {
  transform: scaleX(1);
}

.nav-auth {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.nav-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 76px;
  height: 38px;
  padding: 0 20px;
  border-radius: 999px;
  color: #fff;
  background: var(--brand);
  font-size: 14px;
  font-weight: 600;
  transition: background 0.18s ease;
}

.nav-login:hover {
  color: #fff;
  background: var(--brand-dark);
}

.nav-user {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px var(--line), 0 4px 14px rgba(29, 35, 43, 0.14);
  overflow: hidden;
  background: #f2f4f7;
}

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

body.is-logged-in .nav-user {
  display: inline-flex;
}

body.is-logged-in .nav-login {
  display: none;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.nav-toggle .icon-close {
  display: none;
}

body.nav-open .nav-toggle .icon-menu {
  display: none;
}

body.nav-open .nav-toggle .icon-close {
  display: block;
}

/* ===== 页脚 ===== */
.site-footer {
  margin-top: 0;
  padding: 44px 0 38px;
  background: #191d24;
  color: #98a2b3;
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.footer-copy p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
}

.footer-copy a {
  color: #cbd3df;
}

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

.footer-friends {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  max-width: 560px;
  padding-top: 2px;
}

.footer-friends span {
  color: #7b8697;
  font-size: 13px;
}

.footer-friends a {
  color: #cbd3df;
  font-size: 13px;
}

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

/* ===== 首页 Banner ===== */
.hero {
  position: relative;
  background: #10141a;
  overflow: hidden;
}

.hero-stage {
  position: relative;
  height: clamp(420px, 46vw, 610px);
}

.hero-slide {
  position: absolute;
  inset: 0;
  display: block;
  color: #fff;
  text-decoration: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.7s ease, visibility 0.7s ease;
}

.hero-slide:hover {
  color: #fff;
}

.hero-slide.is-clickable {
  cursor: pointer;
}

.hero-slide.is-clickable:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.9);
  outline-offset: -4px;
}

.hero-slide.is-active {
  opacity: 1;
  visibility: visible;
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  transition: transform 0.6s ease;
}

.hero-slide.is-clickable:hover img {
  transform: scale(1.05);
}

.hero-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(9, 12, 16, 0.76) 0%, rgba(9, 12, 16, 0.34) 52%, rgba(9, 12, 16, 0.08) 100%),
    linear-gradient(0deg, rgba(9, 12, 16, 0.66) 0%, rgba(9, 12, 16, 0) 46%);
}

.hero-content {
  position: absolute;
  left: 50%;
  bottom: clamp(60px, 9vw, 110px);
  z-index: 2;
  width: 100%;
  max-width: var(--container);
  padding: 0 24px;
  transform: translateX(-50%);
  color: #fff;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.hero-eyebrow img {
  width: 32px;
  height: 32px;
  border-radius: 9px;
}

.hero h1,
.hero-title {
  max-width: 760px;
  font-size: clamp(38px, 5.2vw, 68px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-shadow: 0 8px 30px rgba(0, 0, 0, 0.22);
}

.hero-sub {
  max-width: 660px;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(15px, 1.4vw, 18px);
  letter-spacing: 0.04em;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
  padding: 0;
  list-style: none;
}

.hero-chips li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.11);
  color: rgba(255, 255, 255, 0.94);
  font-size: 13px;
  backdrop-filter: blur(6px);
}

.hero-chips svg {
  width: 15px;
  height: 15px;
}

.hero-dots {
  position: absolute;
  right: calc((100% - var(--container)) / 2 + 24px);
  bottom: 26px;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 9px;
}

.hero-dots button {
  width: 9px;
  height: 9px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.42);
  transition: width 0.25s ease, background 0.25s ease;
}

.hero-dots button.is-active {
  width: 26px;
  border-radius: 999px;
  background: #fff;
}

/* ===== 通用区块 ===== */
.section {
  padding: clamp(48px, 6vw, 78px) 0;
}

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

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

.section-head h2 {
  font-size: clamp(24px, 2.6vw, 34px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.section-head .section-desc {
  margin-top: 8px;
  color: var(--sub);
  font-size: 15px;
}

.section-more {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 4px;
  color: var(--brand-dark);
  font-size: 14px;
  font-weight: 600;
}

.section-more svg {
  width: 16px;
  height: 16px;
}

/* SEO 简介条 */
.intro-strip {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, #fff 0%, #fff8f7 55%, #f4f8ff 100%);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 42px;
  align-items: center;
  padding-top: 34px;
  padding-bottom: 34px;
}

.intro-grid h2 {
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 800;
}

.intro-grid p {
  margin-top: 8px;
  color: var(--sub);
  font-size: 14px;
}

.keyword-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  list-style: none;
}

.keyword-tags li {
  padding: 6px 12px;
  border: 1px solid #f3d8d5;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: #9c5b55;
  font-size: 12px;
}

/* ===== 全景卡片栅格 ===== */
.pano-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
}

.pano-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(233, 237, 242, 0.9);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 6px 20px rgba(29, 35, 43, 0.05);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

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

.pano-cover {
  position: relative;
  display: block;
  aspect-ratio: 2 / 1;
  overflow: hidden;
  background: #eef1f6;
}

.pano-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.pano-card:hover .pano-cover img {
  transform: scale(1.04);
}

.pano-badge {
  position: absolute;
  top: 9px;
  right: 9px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(17, 22, 29, 0.56);
  color: #fff;
  font-size: 11px;
  line-height: 1.5;
  backdrop-filter: blur(4px);
}

.pano-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 12px 14px 14px;
}

.pano-title {
  display: -webkit-box;
  overflow: hidden;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.45;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.pano-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: auto;
  padding-top: 10px;
  color: var(--sub);
  font-size: 11px;
}

.pano-author {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-width: 0;
}

.pano-author img {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  object-fit: cover;
  background: #eef1f6;
}

.pano-author span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pano-stats {
  flex: 0 0 auto;
  color: #a0a8b5;
}

.empty-state {
  padding: 52px 20px;
  border: 1px dashed #dfe5ed;
  border-radius: var(--radius);
  background: #fbfcfe;
  text-align: center;
  color: var(--sub);
}

.empty-state strong {
  display: block;
  margin-bottom: 6px;
  color: var(--ink-2);
  font-size: 17px;
}

/* ===== 分页 ===== */
.pager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 38px;
}

.pager a,
.pager span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fff;
  color: var(--ink-2);
  font-size: 14px;
}

.pager a:hover {
  color: var(--brand-dark);
  border-color: #f3b9b4;
}

.pager .is-current {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
  font-weight: 600;
}

.pager .is-disabled {
  color: #c1c7d0;
  background: #f7f8fa;
}

.pager .pager-ellipsis {
  border-color: transparent;
  background: transparent;
  color: #a2aab6;
  min-width: 20px;
}

.pager-summary {
  margin-top: 14px;
  text-align: center;
  color: var(--sub);
  font-size: 13px;
}

/* ===== 全景频道切换 ===== */
.channel-tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 0 26px;
  border-bottom: 1px solid var(--line);
}

.channel-tabs a {
  position: relative;
  padding: 10px 16px 12px;
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
}

.channel-tabs a::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: -1px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transition: transform 0.2s ease;
}

.channel-tabs a:hover {
  color: var(--brand-dark);
}

.channel-tabs a.is-active {
  color: var(--brand-dark);
}

.channel-tabs a.is-active::after {
  transform: scaleX(1);
}

/* ===== APP 下载 ===== */
.app-section {
  background: linear-gradient(135deg, #fff5f3 0%, #fff 42%, #f3f7ff 100%);
}

.app-panel {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 44px;
  align-items: center;
  padding: clamp(28px, 4vw, 52px);
  border: 1px solid #fff;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

.app-panel h2 {
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 800;
}

.app-panel p {
  margin-top: 10px;
  color: var(--sub);
}

.download-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.download-item {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 152px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
  box-shadow: 0 4px 14px rgba(29, 35, 43, 0.04);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.download-item:hover {
  color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(29, 35, 43, 0.09);
}

.platform-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  color: #fff;
  flex: 0 0 auto;
}

.platform-icon svg {
  width: 24px;
  height: 24px;
}

.platform-icon.android {
  background: linear-gradient(135deg, #35c97a, #1fa462);
}

.platform-icon.ios {
  background: linear-gradient(135deg, #434a56, #14171c);
}

.platform-icon.harmony {
  background: linear-gradient(135deg, #5b9dff, #2f6fe4);
}

.download-text {
  display: block;
  min-width: 0;
}

.download-text strong {
  display: block;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
}

.download-sub {
  display: block;
  margin-top: 1px;
  color: var(--sub);
  font-size: 11px;
}

.app-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.app-posters {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: 14px;
  width: 100%;
  max-width: 460px;
}

.app-poster {
  margin: 0;
  overflow: hidden;
  border-radius: 20px;
  background: #1b1d26;
  box-shadow: 0 18px 40px rgba(23, 27, 33, 0.18);
}

.app-poster img {
  display: block;
  width: 100%;
  height: auto;
}

/* ===== 业务合作双卡 ===== */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.biz-card {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 3.4vw, 42px);
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
  box-shadow: var(--shadow);
}

.biz-card::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -70px;
  width: 190px;
  height: 190px;
  border-radius: 50%;
  background: rgba(232, 98, 90, 0.07);
}

.biz-card.blue::before {
  background: rgba(89, 142, 220, 0.1);
}

.biz-card h2 {
  position: relative;
  font-size: clamp(21px, 2.2vw, 27px);
  font-weight: 800;
}

.biz-card p {
  position: relative;
  max-width: 520px;
  margin-top: 10px;
  color: var(--sub);
  font-size: 15px;
}

.biz-list {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 26px;
  padding: 0;
  list-style: none;
}

.biz-list li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border-radius: 8px;
  background: var(--brand-soft);
  color: #a85851;
  font-size: 12px;
}

.biz-card.blue .biz-list li {
  background: #eef5ff;
  color: #4a72ad;
}

.biz-list svg {
  width: 13px;
  height: 13px;
}

.biz-card .btn {
  position: relative;
}

/* ===== 内页 Hero ===== */
.page-hero {
  padding: clamp(40px, 6vw, 70px) 0 clamp(28px, 4vw, 44px);
  background:
    radial-gradient(900px 320px at 12% 0%, rgba(232, 98, 90, 0.11), transparent 65%),
    radial-gradient(700px 300px at 88% 10%, rgba(96, 144, 220, 0.1), transparent 65%),
    #fbfcfd;
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  font-size: clamp(30px, 3.8vw, 48px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.page-hero .lead {
  max-width: 760px;
  margin-top: 12px;
  color: var(--sub);
  font-size: clamp(15px, 1.4vw, 17px);
}

.page-hero .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: #9aa3b0;
  font-size: 12px;
}

.page-hero .breadcrumb a {
  color: #7d8795;
}

.page-hero .breadcrumb a:hover {
  color: var(--brand-dark);
}

/* ===== 教程页 ===== */
.tutorial-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 38px;
  align-items: start;
  padding: clamp(34px, 5vw, 56px) 0 clamp(56px, 7vw, 84px);
}

.tutorial-toc {
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 120px);
  overflow: auto;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 6px 24px rgba(29, 35, 43, 0.04);
}

.tutorial-toc h2 {
  margin-bottom: 4px;
  font-size: 16px;
  font-weight: 700;
}

.tutorial-toc .toc-hint {
  margin-bottom: 12px;
  color: var(--sub);
  font-size: 12px;
}

.toc-group {
  margin-top: 18px;
}

.toc-group h3 {
  margin-bottom: 7px;
  color: #9aa3b0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.toc-group ul {
  padding: 0;
  list-style: none;
}

.toc-group li {
  margin: 2px 0;
}

.toc-group a {
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.45;
  transition: background 0.15s ease, color 0.15s ease;
}

.toc-group a:hover {
  background: #f6f8fb;
  color: var(--brand-dark);
}

.toc-group a.is-active {
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-weight: 600;
}

.tutorial-article {
  min-width: 0;
}

.article-head {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.article-head .article-kicker {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.article-head h1 {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 800;
  line-height: 1.28;
}

.article-body {
  padding-top: 26px;
  color: #3c4552;
  font-size: 16px;
  line-height: 1.85;
}

.article-body h2 {
  margin: 34px 0 12px;
  color: var(--ink);
  font-size: clamp(21px, 2.2vw, 26px);
  font-weight: 750;
  line-height: 1.35;
}

.article-body h3 {
  margin: 26px 0 8px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 700;
}

.article-body p {
  margin: 12px 0;
}

.article-body img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 620px;
  margin: 14px 0 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f7f8fa;
}

.article-body .img-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 14px 0 20px;
}

.article-body .img-row img {
  margin: 0;
}

.article-body iframe {
  display: block;
  width: 100%;
  max-width: 720px;
  aspect-ratio: 16 / 9;
  margin: 16px 0 22px;
  border: 0;
  border-radius: 12px;
  background: #000;
}

.article-body a {
  color: var(--brand-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body .note {
  margin: 18px 0;
  padding: 14px 18px;
  border-left: 3px solid var(--brand);
  border-radius: 0 10px 10px 0;
  background: #fff7f6;
  color: #7d4c48;
  font-size: 14px;
}

.article-body .heavytext {
  color: var(--brand-dark);
  font-weight: 600;
}

.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 38px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.article-nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-2);
  font-size: 13px;
}

.article-nav a:hover {
  color: var(--brand-dark);
}

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

/* ===== 在线拼接页 ===== */
.stitch-wrap {
  padding: clamp(34px, 5vw, 56px) 0 clamp(56px, 7vw, 84px);
}

.stitch-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 26px;
}

.stitch-step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.stitch-step .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 700;
}

.stitch-step strong {
  display: block;
  font-size: 14px;
}

.stitch-step span {
  display: block;
  margin-top: 2px;
  color: var(--sub);
  font-size: 12px;
}

.stitch-panel {
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow);
}

.upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 240px;
  padding: 32px 20px;
  border: 2px dashed #dde4ee;
  border-radius: 16px;
  background: #fbfcfe;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.upload-zone:hover,
.upload-zone.is-dragover {
  border-color: #f0aaa4;
  background: #fff8f7;
}

.upload-zone .upload-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  margin-bottom: 12px;
  border-radius: 18px;
  background: var(--brand-soft);
  color: var(--brand-dark);
}

.upload-zone .upload-icon svg {
  width: 28px;
  height: 28px;
}

.upload-zone strong {
  font-size: 17px;
}

.upload-zone span {
  margin-top: 6px;
  color: var(--sub);
  font-size: 13px;
}

.upload-zone input {
  display: none;
}

.stitch-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 18px;
}

.stitch-tip {
  color: var(--sub);
  font-size: 12px;
}

.stitch-tip a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.stitch-tip label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: 10px;
  color: var(--ink-2);
  cursor: pointer;
}

.stitch-tip input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: var(--brand);
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(128px, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.preview-item {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

.preview-item img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #eef1f6;
}

.preview-item .preview-name {
  overflow: hidden;
  padding: 7px 9px;
  color: var(--sub);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-item .remove {
  position: absolute;
  top: 6px;
  right: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(20, 25, 32, 0.62);
  color: #fff;
  font-size: 15px;
  line-height: 1;
}

.preview-item .order {
  position: absolute;
  top: 6px;
  left: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(232, 98, 90, 0.92);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}

.preview-item .move {
  position: absolute;
  bottom: 33px;
  left: 6px;
  right: 6px;
  display: flex;
  justify-content: space-between;
}

.preview-item .move button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--ink);
  font-size: 14px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.stitch-actions {
  display: none;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 26px;
}

.stitch-actions.is-visible {
  display: flex;
}

.stitch-status {
  display: none;
  margin-top: 22px;
  padding: 14px 18px;
  border-radius: 12px;
  background: #f5f8fd;
  color: #506078;
  font-size: 14px;
}

.stitch-status.is-visible {
  display: block;
}

.stitch-status.is-error {
  background: #fff1f0;
  color: #b3453d;
}

.stitch-result {
  display: none;
  margin-top: 28px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  text-align: center;
}

.stitch-result.is-visible {
  display: block;
}

.stitch-result h2 {
  font-size: 22px;
}

.stitch-result img {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: 520px;
  margin: 18px auto;
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.stitch-result .result-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ===== 联系我们 ===== */
.contact-wrap {
  padding: clamp(34px, 5vw, 56px) 0 clamp(56px, 7vw, 84px);
}

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

.contact-card {
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow);
}

.contact-card h2 {
  font-size: 21px;
  font-weight: 800;
}

.contact-card > p {
  margin-top: 8px;
  color: var(--sub);
  font-size: 14px;
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 14px 15px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfcfe;
}

.contact-item .ci-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand-dark);
}

.contact-item .ci-icon svg {
  width: 19px;
  height: 19px;
}

.contact-item strong {
  display: block;
  font-size: 14px;
}

.contact-item span,
.contact-item a {
  display: block;
  margin-top: 2px;
  color: var(--sub);
  font-size: 13px;
}

.contact-item a:hover {
  color: var(--brand-dark);
}

.contact-qr {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  text-align: center;
}

.contact-qr img {
  width: 180px;
  height: 180px;
  border-radius: 12px;
  border: 1px solid var(--line);
}

.contact-qr p {
  margin-top: 8px;
  color: var(--sub);
  font-size: 12px;
}

.service-list {
  display: grid;
  gap: 14px;
  margin-top: 20px;
  padding: 0;
  list-style: none;
}

.service-list li {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

.service-list h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
}

.service-list h3 svg {
  width: 17px;
  height: 17px;
  color: var(--brand);
}

.service-list p {
  margin-top: 5px;
  color: var(--sub);
  font-size: 13px;
}

.service-list .service-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.service-list .service-actions .btn {
  min-height: 38px;
  padding: 0 16px;
  font-size: 13px;
}

.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
  padding: 0;
  list-style: none;
}

.keyword-cloud li {
  padding: 5px 10px;
  border-radius: 999px;
  background: #f5f7fa;
  color: #7e8794;
  font-size: 12px;
}

/* ===== 网页底部说明 ===== */
.seo-article {
  padding: clamp(38px, 5vw, 60px) 0;
  border-top: 1px solid var(--line);
  background: #fbfcfd;
}

.seo-article h2 {
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
}

.seo-article h2 + p {
  margin-top: 10px;
}

.seo-article p {
  max-width: 980px;
  margin: 9px 0;
  color: #6f7987;
  font-size: 14px;
  line-height: 1.9;
}

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
  .pano-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .hero-dots {
    right: 24px;
  }
}

@media (max-width: 960px) {
  .site-nav {
    gap: 18px;
  }

  .main-nav a {
    padding-left: 10px;
    padding-right: 10px;
  }

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

  .app-panel {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .app-visual {
    min-height: 0;
  }

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

  .tutorial-toc {
    position: static;
    max-height: 330px;
  }
}

@media (max-width: 860px) {
  .site-nav {
    min-height: 62px;
    padding: 0 18px;
  }

  .brand {
    font-size: 18px;
  }

  .brand img {
    width: 34px;
    height: 34px;
    border-radius: 10px;
  }

  .nav-toggle {
    display: inline-flex;
    order: 2;
  }

  .nav-auth {
    order: 3;
    margin-left: 0;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 18px 16px;
    border-bottom: 1px solid var(--line);
    background: #fff;
    box-shadow: 0 18px 30px rgba(29, 35, 43, 0.08);
  }

  body.nav-open .main-nav {
    display: flex;
  }

  .main-nav a {
    padding: 13px 4px;
    border-bottom: 1px solid #f2f4f7;
    font-size: 15px;
  }

  .main-nav a::after {
    display: none;
  }

  .main-nav a:last-child {
    border-bottom: 0;
  }

  .nav-auth {
    order: 3;
    margin-left: auto;
  }

  .footer-inner {
    flex-direction: column;
    gap: 20px;
  }

  .hero-stage {
    height: clamp(430px, 78vw, 560px);
  }

  .hero-content {
    bottom: 64px;
    padding: 0 18px;
  }

  .hero-eyebrow {
    margin-bottom: 14px;
    font-size: 13px;
  }

  .hero-chips {
    margin-top: 20px;
  }

  .hero-dots {
    right: 18px;
    bottom: 20px;
  }

  .pano-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .biz-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

  .section-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .section-more {
    padding-bottom: 0;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .container,
  .site-nav,
  .footer-inner,
  .hero-content {
    padding-left: 16px;
    padding-right: 16px;
  }

  .brand span {
    display: none;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  .nav-login {
    min-width: 64px;
    height: 36px;
    padding: 0 16px;
    font-size: 13px;
  }

  .nav-user {
    width: 38px;
    height: 38px;
  }

  .nav-toggle {
    width: 38px;
    height: 38px;
  }

  .hero-stage {
    height: 480px;
  }

  .hero h1,
.hero-title {
    font-size: 38px;
  }

  .hero-sub {
    font-size: 14px;
  }

  .hero-chips li {
    padding: 7px 11px;
    font-size: 12px;
  }

  .hero-dots button {
    width: 8px;
    height: 8px;
  }

  .hero-dots button.is-active {
    width: 22px;
  }

  .pano-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .pano-body {
    padding: 10px 11px 12px;
  }

  .pano-title {
    font-size: 13px;
  }

  .pano-meta {
    font-size: 10px;
  }

  .pano-stats {
    display: none;
  }

  .app-panel,
  .biz-card,
  .contact-card,
  .stitch-panel {
    border-radius: 16px;
  }

  .download-item {
    min-width: 0;
    flex: 1 1 140px;
  }

  .app-posters {
    grid-template-columns: 1fr;
    max-width: 300px;
    margin: 0 auto;
    gap: 14px;
  }

  .app-poster {
    border-radius: 14px;
  }

  .article-body {
    font-size: 15px;
    line-height: 1.8;
  }

  .article-body img {
    max-height: 480px;
  }

  .preview-grid {
    grid-template-columns: repeat(auto-fill, minmax(108px, 1fr));
    gap: 9px;
  }

  .preview-item .move {
    bottom: 31px;
  }

  .contact-qr img {
    width: 160px;
    height: 160px;
  }

  .pager a,
  .pager span {
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    font-size: 13px;
  }

  .channel-tabs {
    margin-bottom: 18px;
  }

  .channel-tabs a {
    padding: 9px 12px 11px;
    font-size: 14px;
  }

  .channel-tabs a::after {
    left: 12px;
    right: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}