:root {
  --ink: #112843;
  --muted: #5e758e;
  --line: #d9e6f0;
  --paper: #ffffff;
  --mist: #f5f9fc;
  --blue: #1768d8;
  --blue-dark: #0f55b6;
  --teal: #178c80;
  --teal-mist: #e4f7f3;
  --navy: #102a44;
  --radius: 20px;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  color: var(--ink);
  background: var(--mist);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--mist); }
a { color: inherit; text-decoration: none; }
button, select { font: inherit; }

.page-shell { overflow: hidden; }
.content-width { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.eyebrow { margin: 0 0 12px; color: var(--teal); font-size: .75rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.section-title { margin: 0; font-size: clamp(1.9rem, 4vw, 3rem); line-height: 1.1; letter-spacing: -.06em; }
.section-copy { max-width: 42rem; margin: 14px 0 0; color: var(--muted); line-height: 1.75; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 20px; border-radius: 999px; font-size: .95rem; font-weight: 800; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--blue); box-shadow: 0 12px 24px rgb(23 104 216 / .22); }
.button-primary:hover { background: var(--blue-dark); }
.button-secondary { color: var(--blue); border: 1px solid #bcd5ee; background: #fff; }
.button-disabled { color: #778c9f; background: #e9f0f5; cursor: not-allowed; box-shadow: none; }

.site-header { position: sticky; z-index: 10; top: 0; display: flex; align-items: center; justify-content: space-between; width: min(1120px, calc(100% - 48px)); min-height: 76px; margin: 0 auto; }
.site-header::before { position: fixed; z-index: -1; inset: 0 0 auto; height: 76px; content: ""; background: rgb(255 255 255 / .9); border-bottom: 1px solid rgb(217 230 240 / .82); backdrop-filter: blur(14px); }
.brand { color: var(--ink); font-size: 1rem; font-weight: 900; letter-spacing: -.04em; }
.brand span, .site-footer strong span { color: #7090a8; font-weight: 600; }
.site-navigation { display: flex; align-items: center; gap: 25px; color: #58728c; font-size: .88rem; }
.site-navigation > a { transition: color .2s ease; }
.site-navigation > a:hover, .site-navigation > a[aria-current="page"] { color: var(--blue); font-weight: 800; }
.site-navigation .nav-download { padding: 10px 15px; color: #fff; border-radius: 999px; background: var(--blue); }
.menu-toggle { display: none; padding: 8px 10px; color: var(--blue); border: 1px solid #c4d9ed; border-radius: 8px; background: #fff; }

.hero { position: relative; padding: 92px 0 76px; background: linear-gradient(122deg, #e6f2ff 0%, #f9fcff 52%, #e3f7f4 100%); }
.hero::after { position: absolute; right: -14%; bottom: -52%; width: 540px; height: 540px; content: ""; border-radius: 50%; background: rgb(137 213 201 / .35); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, .9fr) minmax(380px, 1.1fr); gap: clamp(32px, 7vw, 100px); align-items: center; }
.hero h1 { max-width: 8.5em; margin: 0; font-size: clamp(2.8rem, 5.7vw, 4.7rem); line-height: .98; letter-spacing: -.09em; }
.hero .lead { max-width: 35rem; margin: 22px 0 0; color: var(--muted); font-size: 1.08rem; line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.system-note { margin: 12px 0 0; color: #748aa0; font-size: .82rem; }

.app-window { overflow: hidden; color: #d9ebf6; border: 1px solid rgb(182 212 232 / .45); border-radius: 17px; background: #162f48; box-shadow: 0 28px 60px rgb(24 70 107 / .27); transform: rotate(-2deg); animation: app-float 6s ease-in-out infinite; }
.window-bar { display: flex; align-items: center; gap: 6px; height: 34px; padding: 0 14px; color: #b6cede; background: #203c57; font-size: .72rem; }
.window-bar::before, .window-bar::after { width: 7px; height: 7px; content: ""; border-radius: 50%; background: #7996ad; }
.window-bar::after { background: #5e7e99; }
.window-title { margin-left: 6px; }
.app-body { display: grid; grid-template-columns: 120px 1fr; min-height: 290px; }
.app-side { padding: 21px 14px; background: #122840; color: #8eabc0; font-size: .78rem; }
.app-side b { display: block; margin-bottom: 26px; color: #f1fbff; font-size: .86rem; }
.app-side span { display: block; padding: 9px; margin-bottom: 6px; border-radius: 6px; }
.app-side .is-active { color: #fff; background: #285271; }
.app-main { padding: 21px; background: #17334d; }
.app-main-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; color: #f4fbff; font-weight: 800; }
.app-add { padding: 8px 10px; color: #fff; border-radius: 6px; background: #269a96; font-size: .72rem; }
.app-input { padding: 12px; margin-bottom: 12px; color: #9cb6c8; border-radius: 7px; background: #24435d; font-size: .75rem; }
.app-input em { color: #80e3d6; font-style: normal; }
.task-row { display: grid; grid-template-columns: 26px minmax(0, 1fr) auto; gap: 11px; align-items: center; padding: 11px 0; border-top: 1px solid #294c64; }
.file-icon { width: 22px; height: 26px; border-radius: 4px; background: linear-gradient(135deg, #8acdf8, #5a9bdc); }
.file-icon.teal { background: linear-gradient(135deg, #8ae0ce, #4aa899); }
.task-row strong { display: block; overflow: hidden; color: #effaff; font-size: .78rem; text-overflow: ellipsis; white-space: nowrap; }
.task-row small { color: #92adbf; font-size: .67rem; }
.progress-track { height: 5px; margin: 6px 0; overflow: hidden; border-radius: 999px; background: #2a5068; }
.progress-track i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #2db7a6, #83e4d3); animation: progress-pulse 4.5s ease-in-out infinite; }
.task-percent { color: #7be5d4; font-size: .72rem; font-weight: 800; }

.source-ribbon { position: relative; z-index: 2; display: flex; align-items: center; gap: 10px; width: min(1040px, calc(100% - 48px)); padding: 17px 20px; margin: -28px auto 0; overflow: auto; border: 1px solid #e2edf4; border-radius: 13px; background: rgb(255 255 255 / .94); box-shadow: 0 14px 28px rgb(45 84 119 / .1); }
.source-ribbon b { margin-right: auto; white-space: nowrap; font-size: .9rem; }
.source-ribbon span { padding: 7px 10px; white-space: nowrap; color: #59768f; border-radius: 7px; background: #edf5fa; font-size: .8rem; }

.section { padding: 112px 0; }
.section-soft { background: #fff; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 38px; }
.feature-card { padding: 24px; border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: 0 10px 24px rgb(43 81 114 / .06); }
.feature-icon { display: grid; place-items: center; width: 38px; height: 38px; margin-bottom: 18px; color: var(--teal); border-radius: 10px; background: var(--teal-mist); font-weight: 900; }
.feature-card h3, .platform-card h3 { margin: 0; font-size: 1.07rem; letter-spacing: -.03em; }
.feature-card p, .platform-card p { margin: 9px 0 0; color: var(--muted); line-height: 1.65; }

.cloud-panel { display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(32px, 7vw, 90px); align-items: center; padding: clamp(32px, 6vw, 72px); border-radius: var(--radius); background: linear-gradient(125deg, #eaf7ff, #faffff 54%, #e2f7f2); }
.cloud-panel h2, .privacy-panel h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.08; letter-spacing: -.07em; }
.cloud-panel p, .privacy-panel p { color: var(--muted); line-height: 1.75; }
.mini-steps { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 23px; }
.mini-steps span { padding: 8px 10px; color: #456a82; border-radius: 999px; background: #fff; box-shadow: 0 4px 14px rgb(47 102 138 / .08); font-size: .82rem; }
.mini-steps b { color: var(--teal); }
.cloud-window { overflow: hidden; color: #d9ebf6; border-radius: 16px; background: #17324c; box-shadow: 0 24px 43px rgb(30 89 119 / .23); transform: rotate(1.5deg); }
.cloud-content { display: grid; grid-template-columns: 100px 1fr; min-height: 265px; }
.cloud-tabs { display: flex; gap: 7px; margin: 14px 0; overflow: auto; }
.cloud-tabs span { padding: 7px 8px; white-space: nowrap; color: #9eb8cb; border-radius: 5px; background: #254660; font-size: .68rem; }
.cloud-tabs .is-selected { color: #e3fffa; background: #277571; }
.crumb { margin-bottom: 8px; color: #96b0c2; font-size: .68rem; }
.cloud-row { display: grid; grid-template-columns: 18px 1fr auto; gap: 8px; align-items: center; padding: 10px 0; border-top: 1px solid #294c64; font-size: .75rem; }
.folder-icon { width: 17px; height: 12px; border-radius: 3px; background: #f5ca63; }
.cloud-row span { color: #74e2d0; font-size: .68rem; }

.flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 37px; }
.flow-step { position: relative; padding: 28px; border-top: 3px solid #bfece6; border-radius: 13px; background: #f6fbfd; }
.flow-step > b { display: grid; place-items: center; width: 28px; height: 28px; margin-bottom: 14px; color: var(--teal); border-radius: 50%; background: #d9f5ef; font-size: .84rem; }
.flow-step h3 { margin: 0; font-size: 1.08rem; }
.flow-step p { margin: 8px 0 0; color: var(--muted); line-height: 1.65; }

.privacy-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; padding: clamp(32px, 6vw, 70px); color: #ecf8ff; border-radius: var(--radius); background: radial-gradient(circle at 100% 0%, #315f82, transparent 40%), #132e48; }
.privacy-panel p { color: #afc5d7; }
.privacy-panel .mini-steps span { color: #d9fbf6; background: rgb(255 255 255 / .1); box-shadow: none; }
.privacy-panel .mini-steps b { color: #7be3d4; }
.unlock-dialog { position: relative; padding: 24px; color: var(--ink); border-radius: 16px; background: #fff; box-shadow: 0 20px 42px rgb(0 0 0 / .28); }
.unlock-dialog::before { position: absolute; z-index: -1; inset: 14px -14px -14px 14px; content: ""; border-radius: 16px; background: rgb(22 58 83 / .62); }
.unlock-dialog h3 { margin: 0; font-size: 1.12rem; }
.unlock-dialog p { color: var(--muted); font-size: .9rem; }
.password-field { padding: 12px; color: #8294a3; border: 1px solid #dce7ef; border-radius: 8px; }
.unlock-dialog .button { width: 100%; margin-top: 12px; }
.privacy-note { margin-top: 18px; color: #a8c0d1; font-size: .82rem; }

.comparison-table { width: 100%; margin-top: 38px; overflow: hidden; border: 1px solid var(--line); border-radius: 15px; background: #fff; box-shadow: 0 9px 20px rgb(43 81 114 / .05); }
.comparison-row { display: grid; grid-template-columns: 1.3fr repeat(4, 1fr); border-top: 1px solid #e7eff5; }
.comparison-row:first-child { border-top: 0; background: #f5faff; }
.comparison-row > * { display: flex; align-items: center; justify-content: center; min-height: 65px; padding: 12px; color: #5e768d; text-align: center; font-size: .82rem; line-height: 1.55; }
.comparison-row > *:first-child { justify-content: flex-start; color: #334f68; text-align: left; font-weight: 800; }
.comparison-row .versadown { color: #196f6d; background: #eaf8f5; font-weight: 800; }
.comparison-row .comparison-head { color: #314e67; font-size: .86rem; font-weight: 900; }
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 26px; }
.scenario { padding: 23px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.scenario strong { display: block; margin-bottom: 8px; }
.scenario p { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.65; }
.notice { padding: 18px 22px; margin-top: 24px; color: #58758e; border-radius: 11px; background: #eaf5fb; font-size: .88rem; line-height: 1.65; }

.docs-layout { display: grid; grid-template-columns: 215px 1fr; gap: 50px; }
.docs-aside { color: #607991; font-size: .88rem; }
.docs-aside b { display: block; margin: 20px 0 8px; color: #3d5d78; font-size: .8rem; }
.docs-aside b:first-child { margin-top: 0; }
.docs-aside a { display: block; padding: 7px 9px; margin-left: -9px; border-radius: 6px; }
.docs-aside a:hover, .docs-aside a[aria-current="page"] { color: var(--teal); background: var(--teal-mist); font-weight: 800; }
.docs-main .search-box { display: flex; align-items: center; gap: 11px; padding: 15px 17px; margin-bottom: 35px; color: #7c91a3; border: 1px solid var(--line); border-radius: 10px; background: #fff; box-shadow: 0 8px 17px rgb(43 81 114 / .06); }
.docs-main .search-box b { color: var(--blue); font-size: 1.2rem; }
.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.guide-card { padding: 20px; border: 1px solid var(--line); border-radius: 13px; background: #fff; }
.guide-card strong { display: block; }
.guide-card p { margin: 8px 0 0; color: var(--muted); font-size: .9rem; line-height: 1.6; }
.faq-list { margin-top: 48px; }
.faq-list h2 { margin-bottom: 14px; }
.faq-list details { border-top: 1px solid #e5edf3; }
.faq-list summary { padding: 16px 0; color: #46647e; cursor: pointer; font-weight: 800; }
.faq-list p { padding: 0 0 16px; margin: 0; color: var(--muted); line-height: 1.7; }
.article { max-width: 710px; }
.article h1 { margin: 0; font-size: clamp(2.4rem, 5vw, 4rem); letter-spacing: -.06em; }
.article > p { color: var(--muted); line-height: 1.85; }
.article h2 { margin-top: 45px; }
.article-step { display: grid; grid-template-columns: 30px 1fr; gap: 12px; margin-top: 24px; }
.article-step > b { display: grid; place-items: center; width: 29px; height: 29px; color: var(--teal); border-radius: 50%; background: var(--teal-mist); }
.article-step h3 { margin: 2px 0 7px; }
.article-step p { margin: 0; color: var(--muted); line-height: 1.7; }
.article-shot { padding: 18px; margin-top: 16px; color: #d9ebf6; border-radius: 11px; background: #17334d; }

.download-hero { padding: 86px 0 54px; text-align: center; background: linear-gradient(125deg, #eaf5ff, #f8fbff 58%, #e4f7f3); }
.download-hero h1 { margin: 0; font-size: clamp(3rem, 6vw, 5rem); letter-spacing: -.08em; }
.download-hero p { max-width: 40rem; margin: 17px auto 0; color: var(--muted); line-height: 1.7; }
.platform-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 16px; margin-top: -24px; }
.platform-card { padding: 26px; border: 1px solid var(--line); border-radius: 15px; background: #fff; }
.platform-card.is-available { border: 2px solid #a8d9d4; box-shadow: 0 13px 26px rgb(52 116 116 / .12); }
.platform-symbol { display: grid; place-items: center; width: 39px; height: 39px; margin-bottom: 25px; color: var(--teal); border-radius: 10px; background: var(--teal-mist); font-size: 1.25rem; }
.platform-card small { display: block; min-height: 2.8em; margin: 10px 0 18px; color: #71879b; line-height: 1.5; }
.platform-card .button { min-height: 40px; padding: 0 14px; font-size: .82rem; }
.release-box { padding: 30px; margin-top: 45px; border: 1px solid var(--line); border-radius: 15px; background: #fff; box-shadow: 0 10px 23px rgb(43 81 114 / .05); }
.release-controls { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 20px; border-bottom: 1px solid #e6eef4; }
.release-controls label { color: #54718a; font-size: .86rem; font-weight: 800; }
.release-controls select { padding: 8px; margin-left: 8px; color: var(--ink); border: 1px solid #d6e4ef; border-radius: 7px; background: #fff; }
.release-controls a { color: var(--blue); font-size: .86rem; font-weight: 800; }
.release-content { display: grid; grid-template-columns: 130px 1fr; gap: 30px; padding-top: 23px; }
.release-version { padding: 14px; color: #286f71; border-radius: 10px; background: var(--teal-mist); }
.release-version span { font-size: .75rem; }
.release-version h3 { margin: 5px 0 0; font-size: 1rem; }
.release-changes { padding: 0; margin: 0; list-style: none; }
.release-changes li { padding: 8px 0; color: #527089; border-top: 1px solid #edf2f6; line-height: 1.55; }
.release-changes li:first-child { border-top: 0; }

.site-footer { display: grid; grid-template-columns: 1.35fr .65fr 1fr; gap: 48px; padding: 56px max(24px, calc((100% - 1120px) / 2)); color: #acc0d0; background: var(--navy); }
.site-footer strong { color: #fff; font-size: 1.05rem; }
.site-footer p { color: #99b1c5; }
.site-footer b { display: block; margin-bottom: 14px; color: #f3f9ff; font-size: .84rem; }
.site-footer a { display: block; margin: 8px 0; font-size: .86rem; }
.site-footer a:hover { color: #fff; }
.social-links { display: flex; flex-wrap: wrap; gap: 8px; }
.social-links a, .social-links span { padding: 7px 9px; margin: 0; border-radius: 6px; background: rgb(255 255 255 / .08); font-size: .8rem; }
.site-footer small { grid-column: 1 / -1; padding-top: 22px; border-top: 1px solid rgb(203 224 240 / .16); }

@keyframes app-float { 0%, 100% { transform: rotate(-2deg) translateY(0); } 50% { transform: rotate(-2deg) translateY(-9px); } }
@keyframes progress-pulse { 0%, 100% { opacity: .88; } 50% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }
@media (max-width: 850px) {
  .hero-grid, .cloud-panel, .privacy-panel { grid-template-columns: 1fr; }
  .hero-grid { gap: 48px; }
  .hero h1 { max-width: 11em; }
  .app-window { max-width: 600px; width: 90%; margin: 0 auto; }
  .feature-grid, .scenario-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr; }
  .docs-layout { grid-template-columns: 1fr; gap: 30px; }
  .docs-aside { display: flex; flex-wrap: wrap; gap: 6px; }
  .docs-aside b { width: 100%; margin: 12px 0 0; }
  .docs-aside a { margin: 0; }
}
@media (max-width: 680px) {
  .content-width, .site-header { width: min(100% - 32px, 1120px); }
  .site-header { min-height: 66px; }
  .site-header::before { height: 66px; }
  .menu-toggle { display: inline-flex; }
  .site-navigation { position: absolute; top: 62px; right: 0; display: none; width: min(280px, 100%); padding: 12px; align-items: stretch; border: 1px solid var(--line); border-radius: 13px; background: #fff; box-shadow: 0 18px 30px rgb(20 51 77 / .14); }
  .site-navigation.is-open { display: flex; flex-direction: column; }
  .site-navigation > a { padding: 10px; }
  .site-navigation .nav-download { text-align: center; }
  .hero { padding: 68px 0 52px; }
  .hero h1 { font-size: clamp(3rem, 14vw, 4.4rem); }
  .hero .lead { font-size: 1rem; }
  .app-window { width: 100%; transform: none; animation: none; }
  .app-body { grid-template-columns: 76px 1fr; min-height: 240px; }
  .app-side { padding: 16px 8px; font-size: .68rem; }
  .app-main { padding: 14px; }
  .source-ribbon { width: calc(100% - 32px); }
  .source-ribbon b { display: none; }
  .section { padding: 75px 0; }
  .cloud-panel, .privacy-panel { padding: 28px 23px; }
  .cloud-window { transform: none; }
  .comparison-table { overflow: auto; }
  .comparison-row { min-width: 720px; }
  .guide-grid { grid-template-columns: 1fr; }
  .release-controls, .release-content { display: block; }
  .release-controls a { display: inline-block; margin-top: 12px; }
  .release-content { padding-top: 17px; }
  .release-changes { margin-top: 17px; }
  .site-footer { grid-template-columns: 1fr; gap: 26px; padding: 40px 24px 26px; }
}