:root {
  --ink: #071a3b;
  --muted: #5c6d89;
  --subtle: #8290a8;
  --blue: #1267f4;
  --blue-strong: #074ee8;
  --blue-soft: #eef6ff;
  --cyan: #20cfe0;
  --violet: #8568f7;
  --border: #dbe7f5;
  --surface: #ffffff;
  --shadow: 0 28px 80px rgba(36, 99, 184, 0.13);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #fff; color: var(--ink); font-family: var(--font); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }

.site-header {
  position: sticky; top: 0; z-index: 20; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  width: min(1360px, calc(100% - 64px)); height: 82px; margin: 0 auto; background: rgba(255,255,255,.88);
  backdrop-filter: blur(18px); border-bottom: 1px solid rgba(219,231,245,.65);
}
.brand { display: inline-flex; align-items: center; gap: 10px; width: fit-content; font-size: 23px; font-weight: 850; letter-spacing: -.7px; }
.brand img { width: 40px; height: 40px; object-fit: contain; }
.site-nav { display: flex; align-items: center; gap: 46px; color: #1b2d4a; font-size: 15px; font-weight: 610; }
.site-nav a { position: relative; padding: 28px 0; }
.site-nav a::after { position: absolute; right: 0; bottom: 18px; left: 0; height: 2px; border-radius: 3px; background: var(--blue); content: ""; opacity: 0; transform: scaleX(.4); transition: 180ms ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { opacity: 1; transform: scaleX(1); }
.header-cta { justify-self: end; padding: 11px 18px; border-radius: 10px; background: var(--blue); color: white; font-size: 14px; font-weight: 700; }
.menu-button { display: none; }

.hero { position: relative; min-height: 790px; overflow: hidden; padding: 106px max(5vw, calc((100vw - 1360px)/2)); }
.hero::before { position: absolute; inset: 0; background: radial-gradient(circle at 86% 26%, rgba(32,207,224,.11), transparent 27%), radial-gradient(circle at 70% 70%, rgba(18,103,244,.08), transparent 28%); content: ""; pointer-events: none; }
.hero-copy { position: relative; z-index: 3; width: 47%; max-width: 650px; }
.hero h1 { margin: 0; font-size: clamp(52px, 5vw, 78px); font-weight: 880; letter-spacing: -4.5px; line-height: 1.13; }
.hero h1 span, .capabilities h2 span { color: var(--blue); }
.hero-copy > p { max-width: 620px; margin: 24px 0 0; color: var(--muted); font-size: 20px; line-height: 1.75; }
.hero-actions { display: flex; gap: 18px; margin-top: 34px; }
.button { display: inline-flex; min-width: 160px; height: 58px; align-items: center; justify-content: center; gap: 18px; border: 1px solid transparent; border-radius: 11px; font-size: 17px; font-weight: 720; transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: linear-gradient(135deg, var(--blue), #1e7cff); box-shadow: 0 16px 34px rgba(18,103,244,.24); color: #fff; }
.button-primary:hover { box-shadow: 0 20px 42px rgba(18,103,244,.31); }
.button-secondary { border-color: var(--blue); background: rgba(255,255,255,.72); color: var(--blue); }
.hero-copy .trust-line { display: flex; align-items: center; gap: 10px; margin-top: 24px; color: #6f7f99; font-size: 14px; }
.lock-icon { position: relative; display: inline-block; width: 15px; height: 13px; border: 2px solid #788aa4; border-radius: 3px; }
.lock-icon::before { position: absolute; top: -9px; left: 2px; width: 7px; height: 8px; border: 2px solid #788aa4; border-bottom: 0; border-radius: 8px 8px 0 0; content: ""; }
.product-preview { position: absolute; z-index: 4; top: 72px; right: max(4vw, calc((100vw - 1400px)/2)); width: min(52vw, 710px); overflow: hidden; border: 1px solid #bcd9fb; border-radius: 16px; background: rgba(255,255,255,.95); box-shadow: var(--shadow); }
.preview-topbar { display: flex; height: 56px; align-items: center; justify-content: space-between; padding: 0 20px; border-bottom: 1px solid var(--border); }
.mini-brand { display: flex; align-items: center; gap: 7px; font-size: 15px; font-weight: 820; }
.mini-brand img { width: 25px; height: 25px; object-fit: contain; }
.avatar { width: 28px; height: 28px; border-radius: 50%; background: radial-gradient(circle at 50% 35%, #4e82d4 0 18%, transparent 20%), radial-gradient(circle at 50% 105%, #70a1e7 0 38%, #e2f1ff 40%); }
.preview-body { display: grid; grid-template-columns: 142px 1fr; min-height: 574px; }
.preview-sidebar { display: flex; flex-direction: column; gap: 8px; padding: 28px 14px; border-right: 1px solid var(--border); background: rgba(248,252,255,.8); }
.preview-sidebar span { padding: 11px 13px; border-radius: 8px; color: #6d7e98; font-size: 13px; }
.preview-sidebar .is-active { background: #e6f2ff; color: var(--blue); font-weight: 750; }
.preview-content { padding: 17px; }
.dropzone { display: flex; height: 125px; flex-direction: column; align-items: center; justify-content: center; border: 1px dashed #84b9fd; border-radius: 9px; background: linear-gradient(135deg, #fbfdff, #f3f9ff); }
.dropzone strong { margin-top: 8px; font-size: 15px; }
.dropzone small { margin-top: 5px; color: var(--subtle); font-size: 11px; }
.upload-glyph { position: relative; width: 33px; height: 23px; border: 3px solid var(--blue); border-radius: 13px; }
.upload-glyph::before { position: absolute; top: -9px; left: 9px; width: 10px; height: 17px; border-left: 3px solid var(--blue); border-top: 3px solid var(--blue); content: ""; transform: rotate(45deg); }
.file-row { display: flex; height: 54px; align-items: center; gap: 11px; margin-top: 12px; padding: 0 13px; border: 1px solid var(--border); border-radius: 9px; font-size: 12px; }
.file-row small { margin-left: auto; color: var(--subtle); }
.file-play { display: grid; width: 31px; height: 31px; place-items: center; border-radius: 7px; background: linear-gradient(135deg, #7196fa, var(--blue)); color: white; font-size: 10px; }
.note-preview { margin-top: 12px; padding: 16px; border: 1px solid var(--border); border-radius: 10px; }
.note-heading { display: flex; justify-content: space-between; font-size: 16px; }
.note-meta { margin-top: 5px; color: var(--subtle); font-size: 10px; }
.note-tabs { display: flex; gap: 30px; margin-top: 17px; border-bottom: 1px solid var(--border); }
.note-tabs button { padding: 0 0 10px; border: 0; background: transparent; color: #62738d; font-size: 11px; cursor: pointer; }
.note-tabs .is-active { border-bottom: 2px solid var(--blue); color: var(--blue); font-weight: 750; }
.note-panel { margin-top: 12px; padding: 13px; border-radius: 8px; background: linear-gradient(135deg, #f6fbff, #f9f6ff); font-size: 11px; line-height: 1.7; }
.note-panel p { margin: 7px 0; color: #51627d; }
.note-panel ul { margin: 0; padding-left: 17px; color: #51627d; }
.hero-island { position: absolute; z-index: 1; bottom: -42px; left: -4vw; width: 68vw; max-width: 1100px; opacity: .72; pointer-events: none; }

.workflow { position: relative; z-index: 5; width: min(1360px, calc(100% - 64px)); margin: 0 auto; padding: 82px 4vw; border-radius: 22px; background: linear-gradient(135deg, #f8fbff, #eff7ff); }
.section-heading h2, .capabilities h2, .privacy h2, .final-cta h2 { margin: 0; font-size: clamp(36px, 3.5vw, 50px); letter-spacing: -2px; line-height: 1.2; }
.section-heading p { margin: 15px 0 0; color: var(--muted); font-size: 17px; }
.centered { text-align: center; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 64px 0 0; padding: 0; list-style: none; }
.steps li { position: relative; display: grid; grid-template-columns: 48px 66px 1fr; align-items: center; gap: 18px; padding: 0 38px; }
.steps li + li::before { position: absolute; top: 50%; left: 0; width: 1px; height: 78px; background: var(--border); content: ""; transform: translateY(-50%); }
.step-number { display: grid; width: 44px; height: 44px; place-items: center; border-radius: 50%; background: #e8f3ff; color: var(--blue); font-size: 20px; font-weight: 800; }
.step-icon { display: grid; width: 62px; height: 62px; place-items: center; border-radius: 18px; background: white; box-shadow: 0 10px 25px rgba(45,104,186,.08); color: var(--blue); font-size: 26px; }
.file-icon::before { width: 24px; height: 30px; border: 3px solid var(--blue); border-radius: 4px; content: ""; }
.screen-icon::before { width: 31px; height: 23px; border: 3px solid var(--blue); border-radius: 4px; content: ""; box-shadow: 12px 10px 0 -7px white, 12px 10px 0 -4px var(--blue); }
.steps h3 { margin: 0; font-size: 20px; }
.steps p { margin: 7px 0 0; color: var(--muted); font-size: 14px; line-height: 1.65; }

.capabilities { display: grid; grid-template-columns: .8fr 1.2fr; gap: 7vw; width: min(1280px, calc(100% - 64px)); margin: 0 auto; padding: 150px 0; }
.capability-copy h2 { max-width: 430px; }
.feature-list { display: flex; flex-direction: column; gap: 4px; margin-top: 43px; }
.feature-item { display: grid; grid-template-columns: 54px 1fr; align-items: center; gap: 14px; width: 100%; padding: 14px; border: 1px solid transparent; border-radius: 13px; background: transparent; text-align: left; cursor: pointer; }
.feature-item:hover, .feature-item.is-active { border-color: #cfe3fb; background: #f4f9ff; }
.feature-icon { display: grid; width: 48px; height: 48px; place-items: center; border-radius: 13px; background: white; box-shadow: 0 8px 22px rgba(50,105,183,.1); color: var(--blue); font-size: 24px; font-weight: 800; }
.feature-item strong, .feature-item small { display: block; }
.feature-item strong { font-size: 18px; }
.feature-item small { margin-top: 6px; color: var(--muted); font-size: 14px; }
.note-stage { align-self: center; overflow: hidden; border: 1px solid #d6e5f6; border-radius: 18px; background: white; box-shadow: var(--shadow); }
.stage-bar { display: flex; height: 55px; align-items: center; gap: 7px; padding: 0 18px; border-bottom: 1px solid var(--border); font-size: 12px; }
.stage-bar > span { width: 8px; height: 8px; border-radius: 50%; background: #ff7d7d; }
.stage-bar > span:nth-child(2) { background: #ffd875; }.stage-bar > span:nth-child(3) { background: #61d593; }
.stage-bar strong { margin-left: 7px; }
.stage-bar button { margin-left: auto; padding: 7px 13px; border: 0; border-radius: 7px; background: #e9f3ff; color: var(--blue); font-size: 11px; font-weight: 750; }
.stage-body { display: grid; grid-template-columns: 165px 1fr; min-height: 465px; }
.stage-body aside { display: flex; flex-direction: column; gap: 7px; padding: 24px 14px; border-right: 1px solid var(--border); background: #fbfdff; }
.stage-body aside button { padding: 12px; border: 0; border-radius: 8px; background: transparent; color: #61728c; text-align: left; font-size: 12px; }
.stage-body aside .is-active { background: #eaf4ff; color: var(--blue); font-weight: 730; }
.stage-body article { padding: 34px 38px; }
.stage-label { color: var(--blue); font-size: 12px; font-weight: 750; }
.stage-body article h3 { margin: 13px 0 12px; font-size: 24px; }
.stage-body article > p { margin: 0 0 25px; color: var(--muted); font-size: 14px; line-height: 1.8; }
.insight { display: grid; grid-template-columns: 34px 1fr; gap: 12px; padding: 13px 0; border-top: 1px solid var(--border); }
.insight span { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 50%; background: var(--blue); color: white; font-size: 11px; font-weight: 750; }
.insight p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }.insight strong { display: block; color: var(--ink); }

.privacy { position: relative; display: grid; grid-template-columns: 100px 1fr; gap: 32px; width: min(1360px, calc(100% - 64px)); min-height: 210px; align-items: center; margin: 0 auto; padding: 44px 64px; overflow: hidden; border: 1px solid #d9e9fa; border-radius: 22px; background: linear-gradient(115deg, #f6faff, #eaf4ff); }
.privacy-lock { position: relative; display: grid; width: 82px; height: 92px; place-items: center; clip-path: polygon(50% 0, 94% 18%, 87% 72%, 50% 100%, 13% 72%, 6% 18%); background: linear-gradient(145deg, #dbeaff, #bcd9ff); }
.privacy-lock span { width: 26px; height: 23px; border-radius: 5px; background: var(--blue); }
.privacy-lock span::before { display: block; width: 15px; height: 18px; margin: -12px auto 0; border: 4px solid var(--blue); border-bottom: 0; border-radius: 10px 10px 0 0; content: ""; }
.privacy h2 { font-size: 39px; }.privacy p { max-width: 720px; margin: 13px 0 0; color: var(--muted); font-size: 16px; line-height: 1.7; }
.privacy-wave { position: absolute; right: -5%; bottom: 22px; width: 38%; height: 90px; border-top: 2px solid rgba(18,103,244,.35); border-radius: 50%; transform: rotate(-4deg); }
.privacy-wave::after { position: absolute; inset: 19px 0 0; border-top: 2px solid rgba(32,207,224,.35); border-radius: 50%; content: ""; }

.final-cta { padding: 128px 24px 115px; text-align: center; }
.final-cta img { width: 65px; height: 65px; object-fit: contain; }
.final-cta h2 { margin-top: 15px; }.final-cta p { margin: 15px 0 30px; color: var(--muted); font-size: 17px; }
footer { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 28px; width: min(1360px, calc(100% - 64px)); min-height: 105px; margin: 0 auto; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; }
footer .brand { color: var(--ink); font-size: 19px; }footer .brand img { width: 32px; height: 32px; }footer p { margin: 0; }footer nav { display: flex; gap: 28px; }

.legal-page { min-height: 100vh; background: linear-gradient(180deg, #f5faff, #fff 360px); }
.legal-header { display: flex; width: min(980px, calc(100% - 40px)); height: 78px; align-items: center; justify-content: space-between; margin: 0 auto; border-bottom: 1px solid var(--border); }
.legal-header > a:last-child { color: var(--blue); font-size: 14px; font-weight: 700; }
.legal-document { width: min(820px, calc(100% - 40px)); margin: 0 auto; padding: 74px 0 120px; }
.legal-document h1 { margin: 0; font-size: 45px; letter-spacing: -2px; }.legal-document h2 { margin: 42px 0 13px; font-size: 22px; }
.legal-document p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.9; }.legal-document .legal-updated { margin-top: 13px; color: var(--subtle); font-size: 13px; }
.legal-document .legal-notice { margin-top: 35px; padding: 18px 20px; border-left: 3px solid var(--blue); border-radius: 0 10px 10px 0; background: var(--blue-soft); color: #385474; font-size: 14px; }

:focus-visible { outline: 3px solid rgba(18,103,244,.25); outline-offset: 4px; }
@media (prefers-reduced-motion: no-preference) { .product-preview { animation: float 6s ease-in-out infinite; } @keyframes float { 50% { transform: translateY(-8px); } } }

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; width: calc(100% - 36px); }
  .menu-button { display: flex; width: 42px; height: 42px; flex-direction: column; align-items: center; justify-content: center; gap: 6px; border: 0; border-radius: 10px; background: #f1f7ff; }
  .menu-button span { width: 20px; height: 2px; background: var(--ink); }
  .site-nav { position: absolute; top: 72px; right: 0; left: 0; display: none; flex-direction: column; gap: 0; padding: 12px; border: 1px solid var(--border); border-radius: 14px; background: white; box-shadow: var(--shadow); }
  .site-nav.is-open { display: flex; }.site-nav a { width: 100%; padding: 14px; }.site-nav a::after, .header-cta { display: none; }
  .hero { display: flex; min-height: auto; flex-direction: column; padding: 70px 28px 0; }
  .hero-copy { width: 100%; max-width: 720px; }.hero h1 { font-size: clamp(44px, 9vw, 68px); letter-spacing: -3px; }
  .product-preview { position: relative; top: auto; right: auto; width: 100%; max-width: 760px; margin: 65px auto 0; }
  .hero-island { bottom: 170px; width: 100vw; opacity: .35; }
  .steps { gap: 30px; }.steps li { grid-template-columns: 40px 1fr; padding: 0 12px; }.step-icon { display: none; }
  .capabilities { grid-template-columns: 1fr; }.capability-copy { display: grid; grid-template-columns: .8fr 1.2fr; gap: 32px; }.feature-list { margin-top: 0; }
}

@media (max-width: 680px) {
  .site-header { height: 68px; }.brand { font-size: 20px; }.brand img { width: 34px; height: 34px; }
  .hero { padding: 55px 20px 0; }.hero h1 { font-size: 42px; letter-spacing: -2.6px; }.hero-copy > p { font-size: 17px; }
  .hero-actions { flex-direction: column; }.button { width: 100%; }.hero-copy .trust-line { align-items: flex-start; font-size: 12px; }
  .preview-body { grid-template-columns: 1fr; }.preview-sidebar { display: none; }.product-preview { border-radius: 12px; }.preview-content { padding: 11px; }.note-preview { padding: 12px; }.note-tabs { gap: 20px; }
  .workflow, .privacy { width: calc(100% - 32px); }.workflow { padding: 62px 22px; }.section-heading h2, .capabilities h2, .final-cta h2 { font-size: 34px; letter-spacing: -1.5px; }
  .steps { grid-template-columns: 1fr; margin-top: 40px; }.steps li { grid-template-columns: 48px 1fr; padding: 18px 0; }.steps li + li::before { top: 0; right: 0; width: auto; height: 1px; transform: none; }
  .capabilities { width: calc(100% - 36px); padding: 100px 0; }.capability-copy { display: block; }.feature-list { margin-top: 30px; }.feature-item { padding: 11px 5px; }.feature-icon { width: 43px; height: 43px; }.feature-item strong { font-size: 16px; }.feature-item small { font-size: 12px; }
  .stage-body { grid-template-columns: 1fr; }.stage-body aside { display: grid; grid-template-columns: repeat(2,1fr); border-right: 0; border-bottom: 1px solid var(--border); }.stage-body article { padding: 26px 22px; }
  .privacy { grid-template-columns: 64px 1fr; gap: 20px; padding: 34px 22px; }.privacy-lock { width: 62px; height: 70px; }.privacy h2 { font-size: 27px; letter-spacing: -1px; }.privacy p { font-size: 13px; }.privacy-wave { display: none; }
  footer { grid-template-columns: 1fr; width: calc(100% - 36px); padding: 28px 0; }footer nav { flex-wrap: wrap; gap: 20px; }
}