/* 蓝白视觉沿用现有说明图，站点不依赖在线字体或第三方样式。 */
:root {
  --blue: #245bff;
  --blue-dark: #1645d6;
  --ink: #18243e;
  --muted: #67738b;
  --line: #e5eaf3;
  --soft: #f5f7fc;
  --pale: #edf2ff;
  --white: #fff;
  --radius: 18px;
  --font: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--white); font-size: 15px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
body.modal-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; }
button:disabled { cursor: not-allowed; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
::selection { background: #d7e2ff; color: #142957; }
[hidden] { display: none !important; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { line-height: 1.4; }
code { font-family: "Cascadia Code", Consolas, monospace; overflow-wrap: anywhere; }
.svg-library { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 20px; height: 20px; flex: 0 0 auto; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.container { width: min(1184px, calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: fixed; top: -90px; left: 20px; padding: 10px 20px; z-index: 100; color: #fff; background: var(--blue); border-radius: 8px; }
.skip-link:focus { top: 12px; }
.button { min-height: 52px; padding: 12px 25px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; border: 1px solid transparent; border-radius: 9px; font-weight: 600; line-height: 1.4; transition: background .2s, box-shadow .2s, transform .2s; }
.button-primary { color: white; background: var(--blue); box-shadow: 0 5px 12px #245bff14; }
.button-primary:hover { background: var(--blue-dark); box-shadow: 0 6px 18px #245bff29; transform: translateY(-2px); }
.button-white { background: white; border-color: #dce3f1; }
.button-white:hover { background: #f7f9ff; border-color: #bdcdf7; transform: translateY(-2px); }
.button-small { min-height: 40px; padding: 9px 16px; font-size: 13px; }
.text-link { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 600; color: var(--blue); }
.text-link:hover { color: var(--blue-dark); text-decoration: underline; text-underline-offset: 4px; }
.text-link .icon { width: 17px; height: 17px; transition: transform .2s; }
.text-link:hover .icon { transform: translateX(3px); }
.eyebrow { font-size: 11px; font-weight: 700; letter-spacing: 2px; line-height: 1.5; color: var(--blue); }
.section { padding: 98px 0; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 38px; }
h2 { font-size: clamp(27px, 2.6vw, 35px); letter-spacing: -.9px; font-weight: 700; }
.section-heading h2 { margin-top: 12px; }
.section-heading > p { font-size: 14px; color: var(--muted); line-height: 1.9; }

/* 导航 */
.site-header { height: 78px; position: sticky; top: 0; z-index: 30; background: #fffffff0; backdrop-filter: blur(16px); border-bottom: 1px solid #e7ebf4bb; }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 25px; line-height: 1; font-weight: 800; letter-spacing: -.9px; flex-shrink: 0; }
.brand-dot { color: var(--blue); }
.desktop-nav { display: flex; align-items: center; gap: 28px; font-size: 13px; font-weight: 500; }
.desktop-nav a { padding: 26px 0; position: relative; color: #516078; }
.desktop-nav a:hover, .desktop-nav a[aria-current] { color: var(--blue); }
.desktop-nav a[aria-current]::after { content: ""; position: absolute; bottom: 15px; width: 4px; height: 4px; background: var(--blue); border-radius: 50%; left: calc(50% - 2px); }
.header-actions { display: flex; align-items: center; gap: 19px; }
.preview-label { font-size: 11px; color: var(--muted); }
.menu-toggle { display: none; border: 0; background: var(--pale); width: 40px; height: 40px; border-radius: 8px; align-items: center; justify-content: center; flex-direction: column; gap: 5px; flex-shrink: 0; }
.menu-toggle span { display: block; width: 17px; height: 2px; background: var(--ink); transition: transform .2s; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
.mobile-nav { position: absolute; top: 100%; width: 100%; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 10px 20px #18243e0d; padding: 12px 24px 22px; }
.mobile-nav a { display: block; padding: 12px 0; border-bottom: 1px solid var(--line); }
.mobile-nav > span { display: block; padding-top: 16px; font-size: 12px; color: var(--muted); }

/* 首屏：真实截图搭配操作路径，不模拟实时状态。 */
.hero { position: relative; overflow: hidden; background: linear-gradient(105deg, #f8faff 10%, #f4f7ff 58%, #edf3ff); }
.hero-grid { position: absolute; inset: 0; pointer-events: none; opacity: .5; background-image: linear-gradient(#b6c5ef21 1px, transparent 1px), linear-gradient(90deg, #b6c5ef21 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(100deg, transparent 27%, #000); }
.hero-layout { display: grid; grid-template-columns: 1.03fr 1fr; align-items: center; gap: 36px; min-height: 636px; padding-block: 72px 84px; position: relative; }
.hero-copy { padding-bottom: 10px; }
.hero-eyebrow { display: inline-flex; align-items: center; gap: 9px; padding: 7px 12px; background: #fff; border: 1px solid #dce5ff; border-radius: 6px; font-size: 11px; letter-spacing: .4px; }
.eyebrow-dot { width: 6px; height: 6px; background: var(--blue); border-radius: 50%; }
.hero-eyebrow .icon { width: 14px; height: 14px; margin-left: 6px; }
h1 { font-size: clamp(38px, 4.2vw, 57px); font-weight: 750; line-height: 1.36; letter-spacing: -2.6px; margin: 23px 0 20px; }
h1 > span { color: var(--blue); }
.hero-description { color: #6c7890; font-size: 16px; line-height: 1.95; }
.hero-actions { display: flex; gap: 12px; margin-top: 29px; }
.platform-hint { display: flex; gap: 16px; align-items: center; font-size: 11px; margin-top: 28px; color: #7b869b; }
.platform-hint > span:first-child { margin-right: 2px; }
.platform-mini { display: inline-flex; align-items: center; gap: 5px; }
.platform-mini .icon { width: 13px; height: 13px; }
.hero-art { min-width: 0; padding: 30px 8px 35px 20px; position: relative; }
.orbit { position: absolute; z-index: 0; width: 540px; height: 340px; border: 1px dashed #9fbaec66; border-radius: 50%; pointer-events: none; }
.orbit-one { top: 75px; left: -8px; transform: rotate(-25deg); }
.orbit-two { top: 110px; left: 10px; transform: rotate(35deg); }
.art-tag { position: absolute; right: 9px; top: -1px; font-size: 11px; letter-spacing: .5px; color: #6482b5; transform: rotate(4deg); }
.tiny-cross { font-size: 20px; vertical-align: -2px; margin-right: 7px; color: var(--blue); }
.client-preview { width: 100%; position: relative; background: white; border-radius: 14px; border: 1px solid #d3dff7; box-shadow: 0 24px 70px -25px #49649d55, 0 4px 15px #6581b210; transform: rotate(-3deg); }
.window-bar { height: 40px; display: flex; align-items: center; justify-content: space-between; padding: 0 15px; background: #f6f8fc; border-bottom: 1px solid var(--line); border-radius: 14px 14px 0 0; font-size: 10px; color: #8290a8; }
.window-bar .icon { width: 12px; height: 12px; }
.window-dots { display: flex; gap: 5px; }
.window-dots i { width: 6px; height: 6px; border-radius: 50%; background: #cad3e1; }
.window-dots i:first-child { background: #e5b8b4; }
.window-dots i:nth-child(2) { background: #e9d19d; }
.window-dots i:last-child { background: #a6d5b5; }
.client-body { padding: 22px 28px 20px; }
.client-heading { display: flex; justify-content: space-between; align-items: center; }
.client-logo { display: flex; align-items: center; gap: 8px; font-size: 19px; letter-spacing: -.6px; }
.client-logo img { width: 27px; height: 27px; }
.sample-label { font-size: 10px; background: #f1f5fe; color: #6f86b9; border: 1px solid #e4ebfb; padding: 2px 8px; border-radius: 4px; }
.client-tabs { display: flex; justify-content: space-around; padding: 4px; border-radius: 7px; background: #f0f3f9; margin-top: 20px; color: #8390a8; font-size: 10px; }
.client-tabs > span { width: 33.3%; padding: 5px 0; text-align: center; }
.client-tabs .selected { background: #fff; color: var(--ink); border-radius: 5px; box-shadow: 0 2px 5px #33446f10; }
.switch-shot { background: #f7f8ff; border: 1px solid #eef0fa; border-radius: 9px; margin-top: 15px; padding: 16px 20px 17px; display: flex; justify-content: center; overflow: hidden; }
.switch-shot img { width: 210px; mix-blend-mode: multiply; }
.client-caption { display: flex; align-items: center; gap: 10px; margin-top: 15px; }
.caption-mark { width: 33px; height: 33px; border: 1px solid #e5ebf8; display: grid; place-items: center; border-radius: 8px; color: var(--blue); }
.caption-mark .icon { width: 16px; height: 16px; }
.client-caption > div { display: flex; flex-direction: column; gap: 1px; }
.client-caption strong { font-size: 11px; font-weight: 600; }
.client-caption div span { color: #8a96ac; font-size: 9px; }
.caption-arrow { margin-left: auto; width: 15px; height: 15px; color: #b2bfd8; }
.client-preview figcaption { padding: 8px 14px; border-top: 1px solid #eef2f8; text-align: center; color: #8794ab; font-size: 9px; }
.floating-note { position: absolute; display: flex; align-items: center; gap: 13px; bottom: 5px; left: -11px; min-width: 290px; padding: 16px 20px; border-radius: 12px; border: 1px solid #e4eaf6; background: #fff; box-shadow: 0 12px 35px #375f9d1c; transform: rotate(2deg); }
.note-icon { border-radius: 50%; width: 36px; height: 36px; background: #edf7f2; color: #379771; display: grid; place-items: center; }
.note-icon .icon { width: 19px; height: 19px; }
.floating-note strong { display: block; font-size: 12px; }
.floating-note div span { display: block; font-size: 10px; color: #7e8ba1; }
.note-number { margin-left: auto; font-size: 26px; font-weight: 300; color: #c3d0e8; }
.art-bottom-label { position: absolute; right: 6px; bottom: -25px; display: flex; gap: 7px; align-items: center; color: #90a3c3; font-size: 8px; letter-spacing: 1.4px; }
.art-bottom-label span { width: 24px; height: 1px; background: #a5b6d1; }
.hero-bottom { border-top: 1px solid #dce5f3; min-height: 64px; position: relative; display: flex; align-items: center; gap: 26px; color: #8291a9; font-size: 12px; }
.hero-bottom i { height: 3px; width: 3px; border-radius: 50%; background: #b0c1dd; }
.hero-bottom a { margin-left: auto; display: flex; gap: 17px; align-items: center; color: #6e85a7; font-size: 11px; }
.hero-bottom a span { font-size: 19px; }

/* 产品和下载 */
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.feature-card { position: relative; padding: 30px 27px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: border-color .25s, transform .25s, box-shadow .25s; }
.feature-card:hover { border-color: #c1d1ff; box-shadow: 0 10px 28px #27467b0a; transform: translateY(-4px); }
.feature-icon { width: 43px; height: 43px; display: inline-grid; place-items: center; background: var(--pale); border-radius: 12px; color: var(--blue); }
.feature-icon .icon { width: 22px; height: 22px; }
.feature-index { position: absolute; top: 41px; right: 26px; font-size: 9px; letter-spacing: 1px; color: #93a0b7; }
.feature-card h3 { margin-top: 26px; font-size: 18px; letter-spacing: -.4px; }
.feature-card p { font-size: 13px; color: var(--muted); line-height: 1.9; margin-top: 13px; }
.feature-card .text-link { margin-top: 24px; font-size: 12px; }
.download-section { background: var(--soft); border-block: 1px solid #edf0f7; }
.section-tag { display: inline-flex; align-items: center; flex-shrink: 0; gap: 6px; font-size: 11px; padding: 6px 11px; background: #fff8eb; color: #926923; border: 1px solid #f0e0c1; border-radius: 5px; }
.status-dot { width: 5px; height: 5px; background: #c79740; border-radius: 50%; margin-right: 2px; }
.download-notice { display: flex; align-items: flex-start; gap: 10px; padding: 14px 18px; margin-bottom: 22px; color: #6c7690; background: #eaf0fc; border: 1px solid #dee6f6; border-radius: 8px; font-size: 12px; line-height: 1.9; }
.download-notice > .icon { width: 16px; height: 16px; margin-top: 3px; color: #6686c4; }
.download-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.download-card { padding: 28px; background: #fff; border: 1px solid #e0e6f0; border-radius: var(--radius); display: flex; flex-direction: column; }
.windows-card { border-color: #a9c1ff; box-shadow: 0 4px 18px #3761cd08; }
.download-card-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.os-icon { width: 40px; height: 40px; display: grid; place-items: center; color: var(--ink); }
.os-icon .icon { width: 29px; height: 29px; }
.windows-card .os-icon { color: var(--blue); }
.file-tag { border: 1px solid var(--line); border-radius: 4px; padding: 3px 7px; font-size: 10px; color: #7e8ba2; }
.windows-card .file-tag { border-color: #dee8ff; background: #f5f8ff; color: #537ecd; }
.download-card h3 { font-size: 25px; margin-top: 22px; letter-spacing: -.6px; }
.system-meta { font-size: 12px; color: var(--muted); margin-top: 3px; }
.download-description { font-size: 12px; line-height: 1.9; color: #748098; margin-top: 24px; margin-bottom: 20px; }
.filename { font-size: 12px; color: #8692a7; font-family: Consolas, monospace; margin-top: auto; padding: 9px 0 17px; }
.download-button { width: 100%; min-height: 46px; padding: 12px; justify-content: space-between; font-size: 12px; color: #7a8599; background: #edf0f6; border: 1px solid #e6eaf2; }
.download-button .icon { width: 17px; height: 17px; }
.download-action a.button { background: var(--blue); color: #fff; }
.download-action a.button:hover { background: var(--blue-dark); }
.file-note { color: #8a95a8; font-size: 10px; text-align: center; margin-top: 12px; }
.mac-option { display: flex; align-items: center; justify-content: space-between; border: 1px solid var(--line); border-radius: 7px; padding: 9px 12px; gap: 6px; margin-top: 8px; font-size: 12px; }
.mac-option code { font-size: 10px; color: #8d98ad; display: block; line-height: 1.5; }
.small-pending { display: flex; gap: 8px; align-items: center; padding: 4px 0; font-size: 11px; border: 0; background: none; color: #8a95aa; white-space: nowrap; }
a.small-pending { color: var(--blue); }
a.small-pending:hover { text-decoration: underline; }
.download-bottom { display: flex; gap: 20px; align-items: center; justify-content: space-between; margin-top: 23px; }
.download-bottom > p { color: #7b879c; font-size: 12px; display: flex; align-items: center; gap: 8px; }
.download-bottom .icon { width: 16px; height: 16px; }
.download-bottom .text-link { font-size: 12px; flex-shrink: 0; }

/* 教程标签与图解 */
.guide-layout { display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 28px; }
.guide-sidebar { min-width: 0; }
.guide-tabs { position: relative; display: flex; flex-direction: column; gap: 6px; }
.guide-tab { display: flex; width: 100%; align-items: center; gap: 15px; padding: 17px 16px; border: 1px solid transparent; border-radius: 11px; background: #fff; text-align: left; font-size: 14px; font-weight: 600; }
.guide-tab:hover { background: #f8faff; }
.guide-tab .step-number { font-family: Consolas, monospace; font-size: 13px; color: #8f9cb2; font-weight: 400; }
.guide-tab small { display: block; font-size: 11px; font-weight: 400; color: #95a0b3; margin-top: 2px; }
.guide-tab > .icon { margin-left: auto; width: 16px; height: 16px; opacity: 0; }
.guide-tab[aria-selected="true"] { background: var(--pale); border-color: #dce5ff; color: var(--blue); }
.guide-tab[aria-selected="true"] .step-number { color: var(--blue); }
.guide-tab[aria-selected="true"] small { color: #819bd1; }
.guide-tab[aria-selected="true"] > .icon { opacity: 1; }
.guide-sidebar-note { margin: 19px 0 0 16px; font-size: 10px; color: #98a3b6; }
.guide-panel { border: 1px solid var(--line); border-radius: 16px; padding: 28px 32px 18px; min-width: 0; background: #fff; box-shadow: 0 4px 16px #223c7005; }
.guide-panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.guide-panel-heading .eyebrow { font-size: 10px; letter-spacing: 1.5px; }
.guide-panel-heading .text-link { font-size: 11px; }
.guide-panel h3 { font-size: 22px; margin: 18px 0 13px; letter-spacing: -.5px; }
.guide-instructions { margin: 0; padding-left: 22px; color: #6c7890; font-size: 13px; line-height: 1.9; min-height: 84px; }
.guide-instructions li { padding-left: 4px; padding-bottom: 4px; }
.guide-instructions li::marker { color: #8ba2cb; font-size: 11px; }
.guide-screenshot { position: relative; display: flex; align-items: center; justify-content: center; height: 237px; border: 1px solid #e5eaf4; border-radius: 10px; background: #f4f7fc; overflow: hidden; padding: 18px; margin: 18px 0; cursor: zoom-in; }
.guide-screenshot img { width: 100%; height: 100%; object-fit: contain; }
.guide-screenshot > span { position: absolute; bottom: 10px; right: 10px; display: flex; align-items: center; gap: 6px; background: #ffffffed; border: 1px solid #e4eaf5; border-radius: 5px; padding: 5px 9px; color: #6d82ac; font-size: 10px; box-shadow: 0 2px 5px #204f9010; }
.guide-screenshot > span .icon { width: 12px; height: 12px; }
.guide-screenshot:hover { border-color: #aec4f2; }
.guide-tip { display: flex; align-items: flex-start; gap: 9px; padding: 11px 13px; border-radius: 7px; color: #7085ab; background: #f2f6ff; font-size: 11px; line-height: 1.8; }
.guide-tip .icon { width: 15px; height: 15px; margin-top: 2px; }
.guide-panel-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 19px; padding-top: 14px; border-top: 1px solid var(--line); }
.guide-panel-footer > span { font-family: Consolas, monospace; font-size: 11px; color: #8998b1; }
.guide-panel-footer > div { display: flex; gap: 8px; }
.guide-page-button, .guide-next { min-height: 36px; min-width: 36px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid #e1e7f2; border-radius: 6px; color: var(--blue); background: #fff; }
.guide-next { gap: 10px; font-size: 12px; padding: 5px 12px; }
.guide-next .icon { width: 15px; height: 15px; }
.guide-page-button:hover:not(:disabled), .guide-next:hover { background: var(--pale); }
.guide-page-button:disabled { color: #c1c9d7; background: #f8f9fb; }
.proxy-strip { display: flex; justify-content: space-between; align-items: center; gap: 20px; border: 1px solid var(--line); border-radius: 12px; padding: 23px 25px; background: #f9fbff; margin-top: 27px; }
.proxy-label { display: flex; align-items: center; gap: 13px; }
.proxy-label .feature-icon { width: 36px; height: 36px; border-radius: 9px; flex-shrink: 0; }
.proxy-label .feature-icon .icon { width: 19px; height: 19px; }
.proxy-label strong { font-size: 13px; display: block; }
.proxy-label div > span { font-size: 11px; color: #8b97ab; display: block; margin-top: 2px; }
.copy-field { display: flex; align-items: center; gap: 15px; background: #fff; border: 1px solid #e3e9f4; border-radius: 7px; padding: 8px 8px 8px 15px; }
.copy-field code { color: #3d588b; font-size: 14px; user-select: all; }
.copy-button { display: inline-flex; align-items: center; gap: 5px; border: 0; padding: 6px 8px; border-radius: 5px; background: #edf2ff; color: var(--blue); font-size: 11px; white-space: nowrap; }
.copy-button .icon { width: 13px; height: 13px; }
.copy-button:hover { background: #dfe9ff; }
.noscript-note { padding: 20px; margin-block: 16px; background: #fff5e1; }
.noscript-note a { color: var(--blue); text-decoration: underline; }

/* 辅助指南与常见问题 */
.extra-guide-section { padding-bottom: 0; }
.restore-card { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 44px 55px; border: 1px solid #dfe7f8; border-radius: 18px; background: #f1f5ff; overflow: hidden; }
.restore-copy { position: relative; z-index: 1; }
.restore-copy .eyebrow { font-size: 10px; }
.restore-copy h2 { font-size: 30px; line-height: 1.5; margin-top: 12px; }
.restore-copy > p:not(.eyebrow) { color: #7989a5; font-size: 12px; line-height: 1.9; margin-top: 13px; }
.restore-copy .text-link { font-size: 12px; margin-top: 23px; }
.restore-visual { position: relative; width: 340px; height: 225px; flex-shrink: 0; margin-right: 34px; }
.history-stack { position: absolute; width: 250px; height: 176px; border: 1px solid #cfdbf2; border-radius: 13px; }
.stack-back { background: #e4ecff; top: 13px; left: 68px; transform: rotate(12deg); }
.stack-middle { background: #f0f5ff; top: 25px; left: 37px; transform: rotate(2deg); }
.stack-front { padding: 24px; top: 42px; left: 5px; background: #fff; box-shadow: 0 15px 40px #466ac017; transform: rotate(-9deg); }
.history-tag { display: flex; align-items: center; gap: 9px; font-size: 12px; color: #576f9b; }
.history-tag .icon { width: 16px; height: 16px; color: var(--blue); }
.history-line { height: 5px; background: #edf1f8; border-radius: 3px; width: 91%; margin-top: 16px; }
.history-line.short { width: 59%; margin-top: 9px; }
.history-line:nth-of-type(3) { margin-top: 9px; width: 75%; }
.history-label { display: inline-block; margin-top: 17px; font-size: 9px; letter-spacing: .6px; color: #92a4c1; }
.history-arrow { position: absolute; right: 13px; bottom: -9px; display: grid; place-items: center; width: 56px; height: 56px; border-radius: 14px; background: var(--blue); color: #fff; font-size: 34px; font-weight: 300; transform: rotate(5deg); box-shadow: 0 7px 22px #245bff33; }
.restore-details { margin-top: 10px; border: 1px solid var(--line); border-radius: 10px; }
.restore-details > summary { padding: 16px 23px; font-size: 12px; color: #6d7f9e; }
summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 20px; cursor: pointer; }
summary::-webkit-details-marker { display: none; }
summary > span { color: #95a1b4; font-size: 23px; font-weight: 300; transition: transform .2s; flex-shrink: 0; }
details[open] > summary > span { transform: rotate(45deg); }
.restore-details-body { padding: 0 26px 25px; font-size: 13px; color: var(--muted); }
.restore-warning { color: #977640; background: #fcf8ee; padding: 12px 15px; border-radius: 6px; }
.restore-details-body ol { margin: 20px 0; padding-left: 22px; }
.restore-details-body li { margin-bottom: 12px; padding-left: 4px; }
.restore-download { display: flex; gap: 16px; align-items: center; justify-content: space-between; padding: 18px 20px; border-radius: 8px; background: var(--soft); }
.restore-download small { display: block; color: #8d99ad; margin-top: 3px; }
.restore-download button:disabled { background: #e8ecf4; color: #7d889c; }
.faq-layout { display: grid; grid-template-columns: 1fr 1.55fr; gap: 90px; }
.faq-heading h2 { margin-top: 12px; font-size: 31px; }
.faq-heading > p:not(.eyebrow) { font-size: 13px; line-height: 1.9; color: #8592a8; margin-top: 20px; }
.faq-heading .text-link { margin-top: 26px; font-size: 12px; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:first-child { border-top: 1px solid var(--line); }
.faq-list summary { padding: 20px 0; font-size: 14px; font-weight: 500; }
.faq-list details[open] summary { color: var(--blue); }
.faq-list details > div { font-size: 12px; line-height: 1.95; color: #7d8aa1; padding: 0 24px 22px 0; }
.faq-list .text-link { margin-top: 10px; font-size: 11px; }
.support-section { background: #1b3262; color: #fff; padding: 49px 0; }
.support-inner { display: flex; align-items: center; justify-content: space-between; gap: 50px; }
.support-inner .eyebrow { font-size: 9px; color: #88a8ef; letter-spacing: 1.8px; }
.support-inner h2 { font-size: 27px; margin-top: 10px; }
.support-inner p:not(.eyebrow) { font-size: 11px; color: #9db0d4; line-height: 1.9; margin-top: 15px; }
.contact-list { min-width: 330px; }
.contact-row { display: flex; align-items: center; gap: 20px; border-bottom: 1px solid #ffffff1c; padding: 12px 0; }
.contact-type { font-size: 11px; width: 30px; color: #a4b8de; }
.contact-row strong { font-size: 16px; font-weight: 500; letter-spacing: .4px; }
.contact-copy { display: inline-flex; align-items: center; gap: 6px; margin-left: auto; font-size: 10px; border: 1px solid #ffffff26; border-radius: 5px; color: #c4d3f0; padding: 6px 10px; background: #ffffff06; }
.contact-copy .icon { width: 12px; height: 12px; }
.contact-copy:hover { background: #ffffff12; }
.contact-source { display: block; text-align: right; font-size: 9px; color: #819bc5; margin-top: 12px; }
.site-footer { padding: 35px 0 18px; }
.footer-top { display: flex; align-items: center; gap: 25px; padding-bottom: 28px; }
.footer-top .brand { font-size: 22px; }
.footer-top > span { color: #94a0b4; font-size: 11px; }
.footer-top > div { margin-left: auto; display: flex; gap: 28px; font-size: 11px; color: #738098; }
.footer-top a:hover { color: var(--blue); }
.footer-bottom { border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 15px; padding-top: 18px; font-size: 10px; color: #98a4b8; }

/* 图片弹窗和复制反馈 */
.image-dialog { max-width: min(920px, calc(100vw - 48px)); width: 920px; max-height: calc(100dvh - 48px); padding: 0; border: 1px solid #d3dff4; border-radius: 14px; background: #f3f6fd; color: var(--ink); box-shadow: 0 25px 100px #0816344d; }
.image-dialog::backdrop { background: #122448a8; backdrop-filter: blur(5px); }
.image-dialog-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 12px 18px; background: #fff; border-bottom: 1px solid var(--line); }
.image-dialog-toolbar h2 { font-size: 14px; letter-spacing: 0; }
.image-dialog-toolbar > div { display: flex; align-items: center; gap: 20px; }
.image-dialog-toolbar a { font-size: 11px; color: var(--blue); }
.dialog-close { border: 0; border-radius: 6px; color: #7389af; background: #f0f4fb; font-size: 24px; line-height: 1; width: 34px; height: 34px; flex-shrink: 0; }
.image-dialog-scroll { overflow: auto; max-height: calc(100dvh - 108px); overscroll-behavior: contain; }
.image-dialog-scroll img { width: 100%; height: auto; }
.toast { position: fixed; bottom: max(25px, env(safe-area-inset-bottom)); left: 50%; transform: translateX(-50%); padding: 12px 22px; border-radius: 9px; background: #1b3262; color: #fff; font-size: 13px; box-shadow: 0 6px 30px #142e5930; z-index: 60; max-width: calc(100vw - 40px); width: max-content; text-align: center; }
.clipboard-fallback { position: fixed; top: 0; left: -9999px; }

/* 平板与手机：内容自然换行，只有步骤选择器内部可横向滚动。 */
@media (min-width: 1500px) {
  .hero-layout { min-height: 686px; }
}
@media (max-width: 1100px) {
  .container { width: calc(100% - 64px); }
  .desktop-nav { gap: 20px; }
  .preview-label { display: none; }
  .hero-layout { gap: 24px; min-height: 590px; }
  h1 { font-size: 45px; letter-spacing: -2px; }
  .hero-actions { gap: 9px; }
  .hero-actions .button { padding-inline: 18px; font-size: 13px; }
  .platform-hint { flex-wrap: wrap; gap: 10px; font-size: 10px; }
  .hero-art { padding-left: 8px; }
  .client-body { padding: 20px; }
  .floating-note { left: -5px; min-width: 270px; }
  .feature-card { padding: 26px 22px; }
  .feature-index { right: 22px; font-size: 8px; }
  .feature-card h3 { font-size: 16px; }
  .download-card { padding: 23px; }
  .download-grid, .feature-grid { gap: 16px; }
  .download-description { font-size: 11px; }
  .guide-layout { grid-template-columns: 240px minmax(0, 1fr); gap: 20px; }
  .guide-tab { gap: 12px; padding: 17px 12px; font-size: 13px; }
  .guide-panel { padding: 24px 24px 16px; }
  .guide-panel h3 { font-size: 20px; }
  .guide-instructions { font-size: 12px; }
  .guide-screenshot { height: 226px; }
  .proxy-strip { padding-inline: 20px; }
  .copy-field { gap: 8px; }
  .copy-field code { font-size: 12px; }
  .restore-card { padding: 38px 40px; }
  .restore-visual { width: 300px; margin-right: 0; }
  .faq-layout { gap: 50px; }
  .support-inner { gap: 30px; }
  .support-inner h2 { font-size: 24px; }
}
@media (max-width: 860px) {
  .desktop-nav, .header-actions { display: none; }
  .menu-toggle { display: flex; }
  .site-header { height: 68px; }
  .hero-layout { grid-template-columns: 1fr; gap: 45px; padding: 56px 0 60px; }
  .hero-copy { text-align: center; padding: 0; }
  h1 { font-size: 53px; }
  .hero-actions, .platform-hint { justify-content: center; }
  .hero-art { width: min(490px, 100%); justify-self: center; padding: 27px 8px 35px 20px; }
  .client-body { padding: 22px 30px; }
  .hero-bottom { gap: 20px; }
  .section { padding: 72px 0; }
  .section-heading { gap: 20px; }
  .section-heading > p { font-size: 12px; }
  .section-heading h2 { font-size: 27px; }
  .feature-grid { grid-template-columns: 1fr; gap: 14px; }
  .feature-card { padding: 24px 28px 24px 92px; }
  .feature-card .feature-icon { position: absolute; left: 27px; top: 27px; }
  .feature-card h3 { margin-top: 0; font-size: 18px; }
  .feature-card p { max-width: 520px; }
  .feature-index { display: none; }
  .feature-card .text-link { margin-top: 14px; }
  .download-grid { grid-template-columns: 1fr; gap: 16px; }
  .download-card { padding: 27px 30px; display: grid; grid-template-columns: 1fr 1fr; column-gap: 25px; }
  .download-card-top { grid-column: 1 / -1; }
  .download-card h3 { grid-column: 1; }
  .system-meta { grid-column: 1; }
  .download-description { grid-column: 1; grid-row: 4 / 7; margin: 14px 0 0; font-size: 12px; }
  .filename { grid-column: 2; grid-row: 2 / 4; margin: 18px 0 0; align-self: end; padding-bottom: 13px; }
  .download-card > .download-action { grid-column: 2; grid-row: 4; }
  .file-note { grid-column: 2; }
  .mac-option { grid-column: 2; margin-top: 0; }
  .mac-option:nth-of-type(3) { grid-row: 2 / 4; margin-top: 17px; margin-bottom: 7px; }
  .mac-option:nth-of-type(4) { grid-row: 4; }
  .guide-layout { grid-template-columns: 1fr; gap: 18px; }
  .guide-tabs { flex-direction: row; overflow-x: auto; padding: 4px 3px 8px; scrollbar-width: thin; scrollbar-color: #c9d8f5 transparent; }
  .guide-tab { width: 174px; flex: 0 0 auto; padding: 13px 14px; border-color: var(--line); }
  .guide-tab > .icon { display: none; }
  .guide-tab small { font-size: 9px; }
  .guide-sidebar-note { display: none; }
  .guide-panel { padding: 27px 28px 20px; }
  .guide-instructions { min-height: 0; font-size: 13px; }
  .guide-screenshot { height: 270px; }
  .proxy-strip { flex-wrap: wrap; }
  .copy-field { flex-grow: 1; justify-content: space-between; }
  .copy-field code { font-size: 14px; }
  .restore-card { padding: 32px; }
  .restore-visual { width: 240px; transform: scale(.85); transform-origin: center; margin-left: -40px; margin-right: -14px; }
  .restore-copy h2 { font-size: 27px; }
  .restore-copy > p:not(.eyebrow) { font-size: 11px; }
  .faq-layout { grid-template-columns: 1fr; gap: 30px; }
  .faq-heading > p:not(.eyebrow) br { display: none; }
  .faq-heading .text-link { margin-top: 17px; }
  .support-inner { flex-direction: column; align-items: stretch; }
  .contact-list { max-width: 480px; min-width: 0; }
  .contact-source { text-align: left; }
  .footer-top { gap: 18px; }
  .footer-top > div { gap: 18px; }
  .footer-bottom { flex-wrap: wrap; row-gap: 6px; }
}
@media (max-width: 580px) {
  html { scroll-padding-top: 86px; }
  .container { width: calc(100% - 40px); }
  .site-header { height: 64px; }
  .brand { font-size: 23px; gap: 8px; }
  .brand img { width: 31px; height: 31px; }
  .hero-layout { padding: 40px 0 53px; gap: 36px; }
  .hero-eyebrow { font-size: 10px; }
  h1 { font-size: clamp(33px, 8.6vw, 48px); line-height: 1.43; letter-spacing: -1.4px; margin-top: 22px; margin-bottom: 18px; }
  .hero-description { font-size: 13px; line-height: 1.9; }
  .hero-actions { gap: 9px; margin-top: 24px; }
  .hero-actions .button { min-height: 47px; padding: 12px 15px; font-size: 12px; gap: 7px; }
  .hero-actions .icon { width: 17px; height: 17px; }
  .platform-hint { margin-top: 21px; gap: 15px; font-size: 10px; }
  .platform-hint > span:first-child { display: none; }
  .hero-art { width: min(395px, 100%); padding: 24px 13px 30px; }
  .art-tag { right: 16px; top: -3px; font-size: 9px; }
  .client-preview { transform: rotate(-2deg); }
  .window-bar { height: 33px; font-size: 8px; }
  .client-body { padding: 17px 19px; }
  .client-logo { font-size: 16px; }
  .client-logo img { width: 23px; height: 23px; }
  .client-tabs { margin-top: 15px; }
  .switch-shot { padding: 14px 12px; margin-top: 12px; }
  .switch-shot img { width: 185px; }
  .client-caption { margin-top: 12px; }
  .client-caption strong { font-size: 10px; }
  .client-caption div span { font-size: 8px; }
  .client-preview figcaption { font-size: 8px; }
  .floating-note { min-width: 245px; left: 0; bottom: 1px; padding: 12px 15px; gap: 9px; }
  .note-icon { width: 30px; height: 30px; }
  .floating-note strong { font-size: 10px; }
  .floating-note div span { font-size: 9px; }
  .note-number { font-size: 22px; }
  .art-bottom-label { right: 6px; bottom: -21px; font-size: 7px; }
  .hero-bottom { gap: 13px; justify-content: center; font-size: 10px; min-height: 57px; }
  .hero-bottom a { display: none; }
  .section { padding: 57px 0; }
  .section-heading { display: block; margin-bottom: 25px; }
  .section-heading h2 { font-size: 25px; letter-spacing: -1px; margin-top: 10px; }
  .section-heading > p { margin-top: 15px; font-size: 12px; }
  .section-heading > p br { display: none; }
  .eyebrow { font-size: 9px; letter-spacing: 1.6px; }
  .feature-card { padding: 24px 22px; }
  .feature-card .feature-icon { position: static; margin-bottom: 19px; }
  .feature-index { display: block; top: 40px; }
  .feature-card h3 { font-size: 17px; }
  .feature-card p { font-size: 12px; }
  .feature-card .text-link { margin-top: 20px; }
  .section-tag { margin-top: 18px; font-size: 10px; }
  .download-notice { padding: 12px; font-size: 11px; }
  .download-card { display: flex; padding: 25px; }
  .download-card h3 { margin-top: 15px; font-size: 25px; }
  .download-description { margin-top: 16px; margin-bottom: 12px; font-size: 12px; }
  .filename { margin-top: 5px; padding: 8px 0 13px; align-self: start; }
  .download-button { min-height: 48px; }
  .file-note { margin-top: 12px; font-size: 10px; }
  .mac-option:nth-of-type(3), .mac-option:nth-of-type(4) { margin: 8px 0 0; padding: 10px 13px; }
  .download-bottom { flex-direction: column; align-items: flex-start; gap: 9px; }
  .download-bottom > p { font-size: 11px; gap: 6px; }
  .download-bottom .text-link { font-size: 11px; }
  .guide-tab { width: 162px; font-size: 12px; }
  .guide-panel { padding: 23px 19px 16px; }
  .guide-panel h3 { font-size: 19px; margin: 17px 0 14px; }
  .guide-instructions { font-size: 12px; padding-left: 18px; }
  .guide-instructions li { margin-bottom: 7px; }
  .guide-screenshot { height: 190px; padding: 10px; margin: 15px 0; }
  .guide-screenshot > span { font-size: 8px; padding: 4px 7px; }
  .guide-tip { font-size: 10px; padding: 10px; }
  .guide-panel-heading .text-link { font-size: 10px; }
  .proxy-strip { padding: 19px; margin-top: 20px; gap: 15px; }
  .copy-field { padding: 8px 6px 8px 10px; gap: 8px; min-width: 0; }
  .copy-field code { font-size: clamp(10px, 3.1vw, 14px); white-space: nowrap; }
  .copy-button { padding: 6px; gap: 4px; }
  .copy-button .icon { display: none; }
  .proxy-label strong { font-size: 12px; }
  .proxy-label div > span { font-size: 10px; }
  .restore-card { padding: 29px 25px 20px; display: block; }
  .restore-copy h2 { font-size: 28px; }
  .restore-copy > p:not(.eyebrow) br { display: none; }
  .restore-visual { width: 290px; height: 220px; margin: 5px auto -8px; transform: scale(.8); transform-origin: center; }
  .restore-details > summary { padding: 14px 19px; font-size: 11px; }
  .restore-details-body { padding: 0 18px 18px; font-size: 12px; }
  .restore-download { flex-direction: column; align-items: flex-start; padding: 15px; }
  .restore-download code { font-size: 11px; }
  .faq-heading h2 { font-size: 27px; }
  .faq-heading > p:not(.eyebrow) { font-size: 12px; margin-top: 14px; }
  .faq-list summary { font-size: 13px; padding: 18px 0; gap: 10px; }
  .faq-list details > div { font-size: 12px; padding-right: 8px; }
  .support-section { padding: 38px 0; }
  .support-inner { gap: 22px; }
  .support-inner h2 { font-size: 23px; }
  .support-inner p:not(.eyebrow) { font-size: 11px; }
  .contact-row { gap: 13px; }
  .contact-row strong { font-size: 15px; }
  .contact-copy { padding: 7px 10px; }
  .footer-top { flex-wrap: wrap; padding-bottom: 25px; gap: 17px; }
  .footer-top > span { margin-left: auto; font-size: 10px; }
  .footer-top > div { width: 100%; margin-left: 0; margin-top: 6px; gap: 25px; font-size: 11px; }
  .footer-bottom { font-size: 9px; align-items: flex-start; }
  .footer-bottom p:nth-child(2) { order: 3; width: 100%; }
  .image-dialog { max-width: calc(100vw - 16px); max-height: calc(100dvh - 24px); border-radius: 10px; }
  .image-dialog-toolbar { padding: 10px 12px; gap: 9px; }
  .image-dialog-toolbar h2 { font-size: 11px; }
  .image-dialog-toolbar > div { gap: 10px; }
  .image-dialog-toolbar a { font-size: 9px; }
  .image-dialog-scroll { max-height: calc(100dvh - 84px); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}