@charset "UTF-8";

:root {
  --bg: #EDF1F4;
  --bg-2: #E4EAEF;
  --white: #FFFFFF;
  --ink: #1E2A38;
  --muted: #5F7183;
  --teal: #2E7D8F;
  --teal-deep: #1D5C6B;
  --teal-soft: #DCEAEE;
  --warm: #E8794A;
  --line: #D3DDE5;
  --shell: 1150px;
  --header-height: 68px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 18px); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  overflow-wrap: anywhere;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
svg { display: block; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--warm); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 48px), var(--shell)); margin: 0 auto; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 13px; color: var(--teal-deep); font-size: 11px; font-weight: 800; letter-spacing: 2px; line-height: 1.4; }
.eyebrow::before { width: 3px; height: 13px; content: ""; background: var(--warm); }

/* header */
.site-header { position: sticky; top: 0; z-index: 60; border-bottom: 1px solid var(--line); background: rgba(237, 241, 244, .96); backdrop-filter: blur(10px); }
.nav-shell { display: flex; align-items: center; justify-content: space-between; width: min(calc(100% - 48px), var(--shell)); min-height: var(--header-height); margin: 0 auto; gap: 18px; }
.brand { display: inline-flex; align-items: center; flex: none; gap: 9px; font-size: 18px; font-weight: 900; }
.brand img { width: 37px; height: 37px; border: 1px solid var(--line); border-radius: 9px; object-fit: contain; background: #fff; }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(10px, 1.5vw, 22px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 6px 0; border-bottom: 2px solid transparent; color: #4F6376; font-size: 12.5px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--teal); color: var(--ink); }
.nav-actions { display: flex; align-items: center; flex: none; gap: 10px; }
.nav-download { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; gap: 7px; padding: 0 15px; border-radius: 6px; background: var(--teal); color: #fff; font-size: 12.5px; font-weight: 900; white-space: nowrap; transition: background .18s ease; }
.nav-download:hover { background: var(--teal-deep); }
.nav-download svg, .button svg { width: 17px; height: 17px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 40px; height: 40px; padding: 0; border: 1px solid var(--line); border-radius: 6px; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 17px; height: 2px; margin: 4.5px auto; background: var(--ink); transition: transform .18s ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3px) rotate(-45deg); }

/* hero */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background:
  radial-gradient(70% 100% at 100% 0%, #E3EEF0 0%, rgba(227, 238, 240, 0) 62%),
  linear-gradient(180deg, #F4F7F9, var(--bg) 86%); }
.hero::before { position: absolute; inset: 0; content: ""; pointer-events: none; background-image: repeating-linear-gradient(104deg, rgba(46, 125, 143, .07) 0 1px, transparent 1px 26px); mask-image: linear-gradient(180deg, #000, transparent 78%); }
.hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr); align-items: center; gap: clamp(28px, 4.4vw, 58px); padding: 56px 0 62px; }
.hero-copy { min-width: 0; }
.hero-kicker { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 15px; color: var(--muted); font-size: 12px; }
.hero-kicker b { padding: 2px 8px; border-radius: 4px; background: var(--teal-soft); color: var(--teal-deep); font-size: 10.5px; }
.hero h1 { margin: 0; font-size: clamp(38px, 5.4vw, 66px); font-weight: 900; letter-spacing: clamp(-.4px, -.22vw, -1.8px); line-height: 1.08; }
.hero-subtitle { margin: 15px 0 0; color: var(--teal-deep); font-size: clamp(17px, 1.9vw, 21px); font-weight: 800; line-height: 1.45; }
.hero-lead { max-width: 515px; margin: 13px 0 0; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; margin-top: 26px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; gap: 11px; padding: 0 26px; border-radius: 6px; font-size: 14px; font-weight: 900; transition: transform .18s ease, background .18s ease; }
.button-primary { background: var(--teal); color: #fff; box-shadow: 0 12px 24px -14px rgba(46, 125, 143, .9); }
.button-primary:hover { background: var(--teal-deep); transform: translateY(-1px); }
.button-large { min-height: 52px; padding: 0 34px; font-size: 15px; }
.text-link { color: var(--teal-deep); border-bottom: 1px dashed #A6C4CC; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--warm); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 28px 0 0; list-style: none; }
.hero-tags li { padding: 5px 12px; border: 1px solid var(--line); border-radius: 4px; background: rgba(255, 255, 255, .78); color: var(--muted); font-size: 11.5px; }
.hero-tags b { color: var(--ink); font-weight: 900; }

.shelf { min-width: 0; padding: 18px 18px 14px; border: 1px solid #C9D8DF; border-radius: 6px; background: #fff; box-shadow: 10px 10px 0 rgba(30, 42, 56, .06); }
.shelf-head { display: flex; align-items: center; justify-content: space-between; padding: 0 4px 11px; border-bottom: 1px solid var(--line); }
.shelf-head p { margin: 0; font-size: 13.5px; font-weight: 900; }
.shelf-head span { color: var(--muted); font-size: 10.5px; }
.shelf-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; padding: 12px 0 10px; }
.shelf-cell { position: relative; padding: 14px 13px 12px; border: 1px solid var(--line); border-radius: 4px; background: linear-gradient(180deg, #F6FAFB, #EDF4F6); }
.shelf-cell span { display: block; color: var(--teal-deep); font-size: 11px; font-weight: 800; }
.shelf-cell b { display: block; margin: 2px 0 1px; font-size: 24px; font-weight: 900; line-height: 1.2; letter-spacing: -.5px; }
.shelf-cell small { color: var(--muted); font-size: 10px; }
.shelf-foot { padding: 9px 4px 0; margin: 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 10.5px; }

/* features */
.features { padding: 68px 0 72px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 26px; }
.section-heading h2 { margin: 0; font-size: clamp(23px, 2.5vw, 32px); font-weight: 900; letter-spacing: -.4px; line-height: 1.35; }
.section-heading > p:last-child { max-width: 620px; margin: 11px 0 0; color: var(--muted); font-size: 14px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(180px, 280px); align-items: end; gap: 22px; }
.section-heading-split > p:last-child { margin: 0 0 5px; text-align: right; }
.bento { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); grid-auto-rows: minmax(0, auto); gap: 12px; }
.bento article { padding: 20px 21px 18px; border: 1px solid var(--line); border-radius: 6px; background: #fff; min-width: 0; }
.bento-main { display: flex; flex-direction: column; justify-content: center; grid-row: span 3; padding: 26px 26px 24px !important; background: linear-gradient(160deg, #FFFFFF 40%, #EDF5F7 100%) !important; }
.bento span { display: inline-block; margin-bottom: 8px; padding: 1px 8px; border-left: 2px solid var(--teal); background: #F1F7F9; color: var(--teal-deep); font-size: 10.5px; font-weight: 800; }
.bento h3 { margin: 0 0 7px; font-size: 16px; font-weight: 900; line-height: 1.45; }
.bento-main h3 { font-size: 21px; }
.bento p { margin: 0; color: var(--muted); font-size: 12.8px; line-height: 1.8; }
.bento-main p { max-width: 94%; }

/* shots */
.shots { padding: 68px 0 84px; }
.offset-shots { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.offset-shots figure { position: relative; margin: 0; border-radius: 6px; background: #0E1A22; overflow: hidden; }
.offset-shots figure:nth-child(even) { margin-top: 26px; }
.offset-shots img { width: 100%; height: auto; aspect-ratio: 508 / 903; object-fit: cover; object-position: center 4%; }
.offset-shots figcaption { position: absolute; right: 0; bottom: 0; left: 0; display: flex; flex-wrap: wrap; align-items: baseline; gap: 3px 7px; padding: 22px 12px 10px; background: linear-gradient(180deg, rgba(14, 26, 34, 0), rgba(14, 26, 34, .88)); color: #fff; font-size: 12.5px; font-weight: 900; }
.offset-shots figcaption b { color: #FFB48E; font-size: 10px; letter-spacing: 1px; }
.offset-shots figcaption small { flex-basis: 100%; color: rgba(255, 255, 255, .72); font-size: 10.5px; font-weight: 400; }
.sample-note { margin: 28px 0 0; color: var(--muted); font-size: 12px; text-align: center; }

/* faq */
.faq { padding: 66px 0 74px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-2); }
.faq-two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.faq-two details { border: 1px solid var(--line); border-radius: 6px; background: #F7FAFB; }
.faq-two details[open] { background: #fff; }
.faq-two summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 17px; cursor: pointer; list-style: none; }
.faq-two summary::-webkit-details-marker { display: none; }
.faq-two summary h3 { margin: 0; font-size: 14.5px; font-weight: 900; line-height: 1.5; }
.faq-two summary i { position: relative; flex: none; width: 18px; height: 18px; border: 1px solid var(--teal); border-radius: 3px; }
.faq-two summary i::before, .faq-two summary i::after { position: absolute; top: 8px; left: 4px; width: 8px; height: 1.4px; content: ""; background: var(--teal); }
.faq-two summary i::after { transform: rotate(90deg); transition: transform .18s ease; }
.faq-two details[open] summary i::after { transform: rotate(0); }
.faq-two details p { margin: 0; padding: 0 17px 15px; color: var(--muted); font-size: 12.8px; line-height: 1.82; }

/* reviews */
.reviews { padding: 68px 0 74px; }
.review-list { padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); }
.review-card { display: grid; grid-template-columns: 168px minmax(0, 1fr); align-items: start; gap: 18px; padding: 17px 2px; border-bottom: 1px dashed var(--line); }
.review-card time { padding-top: 2px; color: #8496A6; font-size: 10.5px; letter-spacing: .2px; }
.review-card > div { min-width: 0; }
.review-card p { margin: 0; color: #37485A; font-size: 13px; line-height: 1.8; }
.review-card b { display: block; margin-top: 5px; color: var(--teal-deep); font-size: 11.5px; font-weight: 900; }

/* steps */
.steps { padding: 64px 0 72px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; counter-reset: s; }
.step-row li { position: relative; padding: 22px 20px 20px; border: 1px solid var(--line); border-top: 3px solid var(--teal); border-radius: 4px; background: #fff; min-width: 0; }
.step-row span { display: inline-block; margin-bottom: 8px; color: var(--warm); font-size: 10.5px; font-weight: 900; letter-spacing: 1.6px; }
.step-row h3 { margin: 0 0 5px; font-size: 17px; font-weight: 900; }
.step-row p { margin: 0; color: var(--muted); font-size: 12.8px; }

/* download */
.download { padding: 70px 0 78px; }
.download-panel { position: relative; overflow: hidden; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 32px; padding: 40px 42px; border-radius: 8px; background: linear-gradient(118deg, #24697A 0%, #16414D 100%); box-shadow: 0 26px 50px -34px rgba(22, 65, 77, .95); color: #fff; }
.download-panel::after { position: absolute; inset: 0; content: ""; background-image: repeating-linear-gradient(102deg, rgba(255, 255, 255, .06) 0 1px, transparent 1px 22px); }
.download-copy { position: relative; z-index: 2; min-width: 0; }
.download-copy .eyebrow { color: #CFE9EE; }
.download-copy .eyebrow::before { background: #FFB48E; }
.download-copy h2 { margin: 0; font-size: clamp(23px, 2.6vw, 32px); font-weight: 900; line-height: 1.35; }
.download-copy p:last-child { margin: 12px 0 0; color: rgba(255, 255, 255, .85); font-size: 13.5px; }
.download-act { position: relative; z-index: 2; display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }
.download .button-primary { background: #fff; color: var(--teal-deep); box-shadow: none; }
.download .button-primary:hover { background: #EFF7F8; }
.download-notes { display: flex; flex-wrap: wrap; gap: 8px 16px; padding: 0; margin: 0; list-style: none; }
.download-notes li { position: relative; padding-left: 13px; color: rgba(255, 255, 255, .9); font-size: 11.5px; }
.download-notes li::before { position: absolute; top: 8px; left: 0; width: 5px; height: 5px; content: ""; border-radius: 50%; background: #FFB48E; }

/* footer */
.site-footer { padding: 40px 0 34px; border-top: 1px solid var(--line); background: #F4F7F9; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr) minmax(0, auto); align-items: start; gap: 22px; }
.footer-brand strong { font-size: 16px; font-weight: 900; }
.footer-brand p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.footer-nav a { color: #4F6376; font-size: 12.5px; }
.footer-nav a:hover { color: var(--teal-deep); }
.footer-meta { text-align: right; }
.footer-meta p { margin: 0 0 3px; color: var(--muted); font-size: 12px; }
.footer-meta a { color: #4F6376; font-size: 12px; }
.footer-meta a:hover { color: var(--teal-deep); }
.disclaimer { grid-column: 1 / -1; padding-top: 16px; margin: 6px 0 0; border-top: 1px dashed var(--line); color: #8093A3; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1000px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 30px; padding: 46px 0 50px; }
  .shelf { max-width: 520px; }
  .bento { grid-template-columns: minmax(0, 1fr); }
  .bento-main { grid-row: auto; }
  .offset-shots { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .offset-shots figure:nth-child(even) { margin-top: 0; }
  .download-panel { grid-template-columns: minmax(0, 1fr); gap: 24px; padding: 34px 30px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-meta { grid-column: 1 / -1; text-align: left; }
}
@media (max-width: 900px) {
  .primary-nav { position: absolute; top: 100%; right: 0; left: 0; display: none; margin: 0; padding: 10px 24px 16px; border-bottom: 1px solid var(--line); background: #F4F7F9; box-shadow: 0 18px 26px -22px rgba(30, 42, 56, .5); }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav a { padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
  .primary-nav li:last-child a { border-bottom: 0; }
  .menu-toggle { display: block; }
}
@media (max-width: 760px) {
  .page-shell, .nav-shell { width: min(calc(100% - 36px), var(--shell)); }
  .hero h1 { font-size: clamp(32px, 8.4vw, 44px); }
  .hero-subtitle { font-size: 16.5px; }
  .section-heading-split { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .section-heading-split > p:last-child { text-align: left; }
  .faq-two { grid-template-columns: minmax(0, 1fr); }
  .review-card { grid-template-columns: minmax(0, 1fr); gap: 5px; }
  .step-row { grid-template-columns: minmax(0, 1fr); }
  .download-panel { padding: 30px 22px 28px; }
  .download-act { align-items: stretch; }
  .download .button-primary { width: 100%; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .footer-meta { grid-column: auto; }
  .disclaimer { grid-column: auto; }
}
@media (max-width: 520px) {
  .brand span { display: none; }
  .nav-download { padding: 0 13px; font-size: 12px; }
  .shelf-grid { gap: 7px; }
  .shelf-cell { padding: 12px 11px 10px; }
  .shelf-cell b { font-size: 21px; }
  .sample-note { margin-top: 18px; }
}