/* 首屏衬线斜体是品牌签名行，自托管单一字重，避免各平台字体栈不同导致观感漂移。 */
@font-face {
  font-family: 'Newsreader Display';
  src: url('assets/fonts/newsreader-display-italic.woff2') format('woff2');
  font-style: italic;
  font-weight: 400;
  font-display: swap;
}
:root {
  --ink: #202024;
  --muted: #626269;
  --line: #e8e8eb;
  --accent: #ff5427;
  --soft: #fff4ed;
  --warm-line: #f1d6c5;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --serif: 'Newsreader Display', Charter, 'Bitstream Charter', Georgia, serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 32px; }
body { margin: 0; color: var(--ink); background: #fff; font: 17px/1.7 var(--sans); }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
button, a, summary { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
img { display: block; }
.wrap { max-width: 1280px; margin: auto; padding: 0 48px; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 10; background: white; padding: 10px 20px; border: 1px solid var(--line); }
.skip-link:focus { top: 16px; }
.nav { min-height: 104px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 23px; font-weight: 650; letter-spacing: -.8px; white-space: nowrap; }
.brand img { width: 33px; height: 36px; }
.links { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.links a { display: inline-flex; align-items: center; min-height: 44px; font-size: 16px; color: var(--muted); }
.links a:hover, .site-footer a:hover { color: var(--ink); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 20px; min-height: 52px; border: 1px solid #dcdce2; border-radius: 9px; padding: 12px 22px; background: white; color: var(--ink); font-size: 16px; line-height: 1.5; font-weight: 550; }
.button:hover { background: #f7f7f9; }
.button.primary { background: var(--accent); border-color: var(--accent); color: #181818; }
.button.primary:hover { background: #ff693e; border-color: #ff693e; }
.hero { text-align: center; padding: 96px 0 80px; }
.hero h1 { font-size: clamp(42px, 4.6vw, 66px); letter-spacing: -2.8px; line-height: 1.16; font-weight: 550; margin: 0; }
.hero h1 em { font-family: var(--serif); font-weight: 400; letter-spacing: -2px; }
.hero .lede { font-size: 20px; line-height: 1.8; color: var(--muted); margin: 27px auto 30px; max-width: 800px; }
.hero-actions { display: flex; gap: 32px; justify-content: center; align-items: center; flex-wrap: wrap; }
.hero-actions .button { min-height: 56px; padding: 14px 25px; }
.text-link { display: inline-flex; align-items: center; gap: 16px; min-height: 48px; font-size: 17px; }
.shot-section { padding: 0 0 92px; }
.shot { margin: 0; }
.shot img { display: block; width: 100%; height: auto; border: 1px solid var(--warm-line); border-radius: 18px; background: #101014; box-shadow: 0 44px 90px -54px rgba(32, 32, 36, .5), 0 14px 34px -24px rgba(32, 32, 36, .28); }
.flow-section { padding: 0 0 96px; }
.flow-panel { position: relative; display: grid; grid-template-columns: 1fr .84fr 1fr; column-gap: 7%; align-items: center; padding: 48px 38px; border: 1px solid #ece5df; border-radius: 24px; background: #fffdfa; }
.flow-column { position: relative; z-index: 1; align-self: start; }
.flow-label { margin: 0 0 20px; height: 24px; text-align: center; font-size: 19px; line-height: 24px; font-weight: 550; letter-spacing: -.2px; }
.flow-item { display: flex; align-items: center; gap: 16px; background: white; border: 1px solid #ebe2da; border-radius: 15px; padding: 14px 19px; height: 72px; font-size: 19px; font-weight: 500; white-space: nowrap; }
.flow-item + .flow-item { margin-top: 16px; }
.platform-logo { width: 36px; height: 36px; object-fit: contain; flex-shrink: 0; }
.flow-center { position: relative; z-index: 1; margin-top: 44px; min-height: 230px; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 22px; padding: 24px 14px; border: 1px solid #f0cdb6; border-radius: 22px; background: white; box-shadow: 0 12px 40px -30px #d5a38a; }
.flow-center img { width: 76px; height: 76px; }
.flow-center strong { font-size: 27px; font-weight: 600; letter-spacing: -1px; }
.flow-lines { position: absolute; left: 38px; top: 48px; width: calc(100% - 76px); height: 468px; color: #ebc9b5; pointer-events: none; visibility: hidden; }
/* 连线坐标由脚本按节点真实位置计算，未定位完成前不显示，避免无脚本时露出错位的兜底路径。 */
.flow-lines.ready { visibility: visible; }
.soon-row { margin: 24px 0 0; text-align: center; font-size: 17px; line-height: 1.8; color: var(--muted); }
.icon { width: 26px; height: 26px; flex-shrink: 0; }
.output-icon { width: 36px; height: 36px; display: grid; place-items: center; color: #cd512b; flex-shrink: 0; }
.section { padding: 85px 0; border-top: 1px solid var(--line); }
.section-title { font: 550 43px/1.2 var(--sans); letter-spacing: -1.5px; margin: 0 0 44px; max-width: 900px; }
.section-title.centered { text-align: center; margin-left: auto; margin-right: auto; }
.feature-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 24px; }
.feature-card { background: #fbfaf8; border: 1px solid #eeeae6; border-radius: 18px; padding: 22px 24px 30px; text-align: center; }
/* 统一画幅保留主体和安全边距，不裁切时间戳与语言对照。 */
.feature-art { height: 220px; margin: 0 0 24px; display: grid; place-items: center; }
.feature-art img { width: 100%; height: 100%; max-width: 340px; min-height: 0; object-fit: contain; }
.feature-card h3 { font-size: 23px; font-weight: 600; letter-spacing: -.6px; line-height: 1.3; margin: 0 0 13px; }
.feature-card > p { font-size: 17px; line-height: 1.65; margin: 0; color: #625c59; }
.audience-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 42px 60px; }
.audience-item { display: flex; align-items: flex-start; gap: 22px; }
.audience-icon { width: 64px; height: 64px; display: grid; place-items: center; border-radius: 17px; background: var(--soft); color: #cd512b; flex-shrink: 0; }
.audience-icon .icon { width: 30px; height: 30px; }
.audience-item h3 { font-size: 22px; font-weight: 600; letter-spacing: -.4px; line-height: 1.4; margin: 0 0 10px; }
.audience-item p { font-size: 17px; color: var(--muted); line-height: 1.75; margin: 0; }
.pricing-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 28px; max-width: 1000px; margin: auto; }
.plan { position: relative; padding: 36px; border: 1px solid #e3e3e8; border-radius: 18px; }
.plan.pro { border-color: #ff9c7a; background: #fffaf7; }
.plan-badge { position: absolute; top: 20px; right: 20px; margin: 0; padding: 5px 12px; border-radius: 999px; background: var(--accent); color: #181818; font-size: 15px; line-height: 1.5; font-weight: 600; }
.plan h3 { font-size: 26px; letter-spacing: -.6px; margin: 0 0 8px; font-weight: 600; line-height: 1.2; }
.plan-intro { font-size: 17px; color: var(--muted); margin: 0; }
.price { font-size: 58px; letter-spacing: -2.5px; line-height: 1.3; font-weight: 550; margin: 28px 0; }
.price span { font-size: 17px; color: var(--muted); letter-spacing: 0; font-weight: 400; white-space: nowrap; }
.plan-button { width: 100%; }
/* 筹备状态与购买条款保持正常字号，避免把重要信息藏在小字里。 */
.pricing-status { max-width: 760px; margin: -20px auto 34px; text-align: center; font-size: 17px; line-height: 1.8; color: var(--muted); }
.plan-terms { font-size: 17px; line-height: 1.7; color: var(--muted); margin: 18px 0 0; }
.plan-terms a, dialog p a { text-decoration: underline; text-underline-offset: 3px; }
dialog p a { overflow-wrap: anywhere; }
.benefits { list-style: none; padding: 25px 0 0; margin: 28px 0 0; border-top: 1px solid var(--line); }
.benefits li { display: flex; align-items: flex-start; gap: 13px; margin-bottom: 19px; font-size: 17px; line-height: 1.65; }
.benefits li:last-child { margin-bottom: 0; }
.benefits .icon { width: 20px; height: 20px; margin-top: 4px; color: #c84825; }
.benefits strong { font-weight: 650; }
.faq-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; }
.faq-section .section-title { font-size: 39px; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:first-child { border-top: 1px solid var(--line); }
summary { font-size: 18px; font-weight: 500; line-height: 1.6; cursor: pointer; padding: 23px 31px 23px 0; list-style: none; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; position: absolute; right: 0; top: 21px; font-size: 24px; font-weight: 400; color: var(--muted); }
details[open] summary::after { content: '−'; }
.faq-answer { padding: 0 20px 24px 0; }
.faq-answer p { margin: 0; font-size: 17px; line-height: 1.85; color: var(--muted); }
.faq-answer a { text-decoration: underline; text-underline-offset: 3px; }
.site-footer { border-top: 1px solid var(--line); padding: 35px 0; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.site-footer nav { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; color: var(--muted); font-size: 16px; }
.site-footer nav a { min-height: 44px; display: inline-flex; align-items: center; }
dialog { border: 1px solid var(--line); border-radius: 16px; padding: 38px; width: min(460px,calc(100% - 36px)); color: var(--ink); }
dialog::backdrop { background: #20202466; }
dialog h2 { font-size: 28px; letter-spacing: -.7px; line-height: 1.2; margin: 10px 0 20px; }
dialog p { font-size: 17px; color: var(--muted); margin: 0 0 25px; }
.dialog-x { position: absolute; top: 5px; right: 7px; width: 44px; height: 44px; border: 0; background: none; color: var(--muted); font-size: 28px; }
/* 政策页：统一可读性与基础排版。 */
.legal-main { max-width: 760px; margin: auto; padding: 55px 0 85px; }
.legal-main h1 { font-size: 44px; font-weight: 550; letter-spacing: -1.8px; line-height: 1.2; margin: 20px 0; }
.legal-main h2 { font-size: 23px; margin: 35px 0 12px; }
.legal-main p, .legal-main li { font-size: 17px; color: var(--muted); line-height: 1.85; }
.legal-main ul { padding-left: 22px; }
.legal-main .eyebrow { font-size: 16px; color: var(--muted); }
.legal-main a { text-decoration: underline; text-underline-offset: 3px; }
.legal-note { padding: 18px 20px; border-radius: 9px; background: var(--soft); font-size: 17px; line-height: 1.8; color: #8b482d; }
.legal-table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.legal-table th, .legal-table td { padding: 13px 18px 13px 0; border-bottom: 1px solid var(--line); font-size: 17px; line-height: 1.7; color: var(--muted); text-align: left; vertical-align: top; overflow-wrap: anywhere; }
.legal-table th { color: var(--ink); font-weight: 600; width: 42%; }
.legal-table th:last-child, .legal-table td:last-child { padding-right: 0; }
.legal-back { font-size: 16px; color: var(--muted); }
.footer-main { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.site-footer:has(.footer-main) { flex-direction: column; align-items: stretch; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; font-size: 16px; color: var(--muted); }
@media (max-width: 1100px) {
  .wrap { padding: 0 32px; }
  .links { gap: 18px; }
  .nav { gap: 20px; }
  .nav-cta { padding: 10px 16px; }
  .flow-panel { padding: 38px 24px; gap: 4%; }
  .flow-lines { left: 24px; top: 38px; width: calc(100% - 48px); }
  .flow-item { gap: 12px; padding: 12px 14px; font-size: 17px; }
  .platform-logo { width: 31px; height: 31px; }
  .flow-center strong { font-size: 24px; }
  .feature-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .feature-card { padding: 20px 22px 28px; }
  .audience-grid { gap: 38px; }
  .plan { padding: 30px; }
}
@media (max-width: 900px) {
  .links { display: none; }
  .hero { padding: 78px 0 68px; }
  .hero h1 { font-size: 52px; }
  .hero .lede { font-size: 19px; }
  .shot-section { padding: 0 0 70px; }
  .flow-panel { grid-template-columns: 1fr; gap: 0; max-width: 560px; margin: auto; padding: 28px; }
  .flow-lines { display: none; }
  /* 窄屏用两列节点保留全部平台和结果，减少纵向滚动。 */
  .flow-column { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
  .flow-label { grid-column: 1 / -1; height: auto; font-size: 20px; margin: 0 0 8px; }
  .flow-item { min-height: 76px; height: auto; flex-direction: row; justify-content: flex-start; gap: 10px; padding: 12px; font-size: 17px; line-height: 1.35; text-align: left; white-space: normal; }
  .flow-item + .flow-item { margin-top: 0; }
  .platform-logo { width: 28px; height: 28px; }
  .output-icon { width: 28px; height: 28px; }
  .flow-center { min-height: 0; margin: 28px 0; padding: 14px; flex-direction: row; gap: 16px; position: relative; }
  .flow-center::before, .flow-center::after { content: ''; width: 8px; height: 8px; position: absolute; left: calc(50% - 5px); border-right: 1.5px solid #c47e58; border-bottom: 1.5px solid #c47e58; transform: rotate(45deg); }
  .flow-center::before { top: -23px; }
  .flow-center::after { bottom: -19px; }
  .flow-center img { width: 40px; height: 40px; }
  .flow-center strong { font-size: 28px; }
  .feature-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; }
  .section-title { font-size: 37px; }
  .audience-item { gap: 16px; }
  .audience-item h3 { font-size: 20px; }
  .audience-icon { width: 52px; height: 52px; }
  .plan { padding: 26px; }
  .price { font-size: 49px; }
  .price span { display: block; margin-top: 7px; }
  .plan-intro { min-height: 58px; }
  .faq-section { grid-template-columns: 1fr; gap: 0; }
  .faq-section .section-title { font-size: 37px; }
}
@media (min-width: 601px) and (max-width: 700px) {
  .feature-grid { grid-template-columns: 1fr; }
}
/* 窄屏改用面板裁切图（见 index.html 的 <picture>），比例与桌面图不同，需在此固定占位比例避免位移。 */
@media (max-width: 600px) {
  .shot img { aspect-ratio: 858 / 1258; object-fit: cover; }
}
@media (max-width: 600px) {
  .wrap { padding: 0 22px; }
  .nav { min-height: 86px; gap: 12px; }
  .brand { font-size: 20px; gap: 7px; }
  .brand img { width: 28px; height: 31px; }
  .nav-cta { font-size: 16px; min-height: 44px; padding: 9px 12px; gap: 8px; }
  .nav-cta span { display: none; }
  .hero { padding: 56px 0 58px; }
  .hero h1 { font-size: clamp(36px,8.7vw,46px); letter-spacing: -1.7px; line-height: 1.15; }
  .hero h1 em { letter-spacing: -1.2px; }
  .hero .lede { font-size: 18px; line-height: 1.75; margin: 24px auto 29px; }
  .shot-section { padding: 0 0 54px; }
  .shot img { border-radius: 14px; }
  .hero-actions { gap: 24px; }
  .hero-actions .button { padding: 12px 18px; }
  .flow-section { padding: 0 0 58px; }
  .soon-row { font-size: 16px; margin-top: 20px; }
  .flow-panel { padding: 24px 16px; border-radius: 18px; }
  .flow-label { display: none; }
  .flow-item { padding: 12px 8px; gap: 8px; font-size: 16px; }
  .platform-logo, .output-icon { width: 24px; height: 24px; }
  .flow-center { padding: 14px 10px; gap: 12px; }
  .flow-center strong { font-size: 25px; }
  .section { padding: 58px 0; }
  .section-title, .faq-section .section-title { font-size: 33px; letter-spacing: -1px; margin-bottom: 30px; }
  .feature-grid, .audience-grid, .pricing-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 20px 20px 28px; }
  .feature-art { height: 210px; }
  .feature-card h3 { font-size: 23px; }
  .feature-card > p { font-size: 17px; }
  .audience-grid { gap: 32px; }
  .audience-item h3 { font-size: 21px; }
  .audience-item p { font-size: 17px; }
  .plan { padding: 27px; }
  .price { font-size: 53px; }
  .price span { display: inline; margin: 0; font-size: 16px; }
  .plan-intro { min-height: 0; }
  .benefits { margin-top: 24px; }
  .site-footer { flex-direction: column; align-items: flex-start; gap: 14px; }
  .site-footer nav { gap: 25px; }
  .footer-main, .footer-bottom { flex-direction: column; align-items: flex-start; }
  .legal-main { padding: 30px 0 55px; }
  .legal-main h1 { font-size: 36px; }
}
@media (max-width: 360px) {
  .wrap { padding: 0 18px; }
  .nav { flex-wrap: wrap; padding: 20px 0; }
  .nav-cta { display: none; }
  .hero { padding-top: 35px; }
  .hero h1 { font-size: 36px; }
  .hero-actions { gap: 12px; }
  .flow-panel { padding: 24px 14px; }
  .flow-center strong { font-size: 23px; }
  .flow-item { padding: 12px 6px; font-size: 16px; flex-direction: column; text-align: center; gap: 6px; }
  .feature-card { padding: 18px 14px 26px; }
  .price span { display: block; margin-top: 5px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
/* 连接线坐标由节点位置确定。 */
.flow-lines { inset: 0; width: 100%; height: 100%; }