/* DuckStation 中文官网 - 全站样式 */
/* 配色源自官方 Logo：亮橙 #F86A04 / 深橙红 #D54E03 / 金黄 #FDC921，浅色主题 */

:root {
  --c-primary: #F86A04;
  --c-primary-dark: #D54E03;
  --c-accent: #FDC921;
  --c-primary-08: rgba(248, 106, 4, 0.08);
  --c-primary-12: rgba(248, 106, 4, 0.12);
  --c-bg: #FFFFFF;
  --c-bg-soft: #FFF9F0;
  --c-bg-card: #FFFFFF;
  --c-border: #EFE2D6;
  --c-text: #2B2118;
  --c-text-2: #6B5D4F;
  --c-text-3: #98897A;
  --radius: 14px;
  --shadow: 0 2px 12px rgba(213, 78, 3, 0.07);
  --shadow-lg: 0 10px 36px rgba(213, 78, 3, 0.13);
  --maxw: 1160px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary-dark); text-decoration: none; }
a:hover { color: var(--c-primary); }
ul, ol { padding-left: 1.3em; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 可访问性：跳转链接 ---------- */
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--c-primary); color: #fff; padding: 8px 18px; border-radius: 0 0 8px 0; z-index: 999;
}
.skip-link:focus { left: 0; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 90;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--c-border);
}
.nav-wrap { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand img { width: 40px; height: 40px; border-radius: 9px; }
.brand-name { font-size: 21px; font-weight: 800; color: var(--c-text); letter-spacing: 0.2px; }
.brand-name small { display: block; font-size: 11px; font-weight: 500; color: var(--c-text-3); letter-spacing: 1.5px; }

.main-nav { display: flex; gap: 4px; margin-left: auto; }
.main-nav a {
  padding: 8px 16px; border-radius: 9px; font-size: 15px; font-weight: 600; color: var(--c-text-2);
}
.main-nav a:hover { background: var(--c-primary-08); color: var(--c-primary-dark); }
.main-nav a[aria-current="page"] { background: var(--c-primary-12); color: var(--c-primary-dark); }

.nav-cta {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  color: #fff !important; padding: 9px 20px !important; border-radius: 10px;
  font-weight: 700 !important; box-shadow: 0 3px 10px rgba(248, 106, 4, 0.35);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(248, 106, 4, 0.45); }
/* 提升优先级，防止 .main-nav a:hover 的浅色背景覆盖 CTA 按钮 */
.main-nav a.nav-cta:hover,
.main-nav a.nav-cta:focus-visible {
  background: linear-gradient(135deg, #E85D03, #C24502);
  color: #fff;
}

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; margin-left: auto; }
.nav-toggle svg { width: 24px; height: 24px; stroke: var(--c-text); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 30px; border-radius: 11px; font-size: 16px; font-weight: 700;
  border: 0; cursor: pointer; font-family: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn:focus-visible, .nav-toggle:focus-visible, .qr-item a:focus-visible, a:focus-visible { outline: 3px solid var(--c-accent); outline-offset: 2px; }
.btn-primary {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-dark) 100%);
  color: #fff; box-shadow: 0 4px 14px rgba(248, 106, 4, 0.38);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(248, 106, 4, 0.48); color: #fff; }
.btn-ghost {
  background: #fff; color: var(--c-primary-dark);
  border: 2px solid var(--c-primary); padding: 11px 28px;
}
.btn-ghost:hover { background: var(--c-primary-08); transform: translateY(-2px); }
.btn-sm { padding: 9px 22px; font-size: 14.5px; }
.btn-lg { padding: 16px 40px; font-size: 17.5px; }
.btn svg { width: 19px; height: 19px; }

/* ---------- 首页 Hero ---------- */
.hero {
  background:
    radial-gradient(900px 460px at 88% -12%, rgba(253, 201, 33, 0.20), transparent 62%),
    radial-gradient(760px 420px at 5% -8%, rgba(248, 106, 4, 0.08), transparent 58%),
    var(--c-bg-soft);
  border-bottom: 1px solid var(--c-border);
  overflow: hidden;
}
.hero-inner {
  display: grid; grid-template-columns: 1.06fr 0.94fr; gap: 48px; align-items: center;
  padding: 64px 0 64px;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--c-border); border-radius: 999px;
  padding: 6px 16px; font-size: 13.5px; font-weight: 600; color: var(--c-primary-dark);
  box-shadow: var(--shadow); margin-bottom: 22px;
}
.hero-badge svg { width: 15px; height: 15px; }
.hero h1 { font-size: 44px; line-height: 1.22; font-weight: 800; letter-spacing: -0.5px; }
.hero h1 em { font-style: normal; color: var(--c-primary); }
.hero-sub { font-size: 18px; color: var(--c-text-2); margin: 18px 0 32px; max-width: 540px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 38px; }
.hero-stats > div { min-width: 110px; }
.hero-stats b { display: block; font-size: 26px; font-weight: 800; color: var(--c-primary-dark); }
.hero-stats span { font-size: 13px; color: var(--c-text-3); }
.hero-figure {
  background: #fff; border: 1px solid var(--c-border); border-radius: 20px;
  padding: 12px; box-shadow: var(--shadow-lg);
}
.hero-figure img { border-radius: 12px; width: 100%; }
.hero-figure figcaption { font-size: 12.5px; color: var(--c-text-3); text-align: center; padding-top: 8px; }

/* ---------- 通用 Section ---------- */
.section { padding: 76px 0; }
.section-alt { background: var(--c-bg-soft); border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }
.section-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.kicker {
  display: inline-block; font-size: 13px; font-weight: 800; letter-spacing: 2.5px;
  color: var(--c-primary); text-transform: uppercase; margin-bottom: 12px;
}
.section-head h2 { font-size: 32px; font-weight: 800; letter-spacing: -0.4px; line-height: 1.3; }
.section-head p { color: var(--c-text-2); margin-top: 14px; font-size: 16.5px; }

/* ---------- 场景卡片 ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scene-card {
  background: var(--c-bg-card); border: 1px solid var(--c-border); border-radius: var(--radius);
  padding: 30px 28px; box-shadow: var(--shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.scene-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.scene-icon {
  width: 52px; height: 52px; border-radius: 13px; background: var(--c-primary-12);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.scene-icon svg { width: 26px; height: 26px; stroke: var(--c-primary-dark); fill: none; stroke-width: 1.8; }
.scene-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.scene-card p { font-size: 15px; color: var(--c-text-2); }

/* ---------- 优势列表（首页） ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px 28px; }
.adv-item {
  display: flex; gap: 16px; background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow);
}
.adv-item svg { width: 24px; height: 24px; stroke: var(--c-primary); fill: none; stroke-width: 2; flex-shrink: 0; margin-top: 3px; }
.adv-item h3 { font-size: 17.5px; font-weight: 700; margin-bottom: 6px; }
.adv-item p { font-size: 14.5px; color: var(--c-text-2); }

/* ---------- 特性 / 功能表格 ---------- */
.feat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.feat-block { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); }
.feat-block h3 { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 700; margin-bottom: 14px; }
.feat-block h3 svg { width: 22px; height:  22px; stroke: var(--c-primary-dark); fill: none; stroke-width: 2; }
.feat-block ul { list-style: none; padding: 0; }
.feat-block li { position: relative; padding: 5px 0 5px 24px; font-size: 15px; color: var(--c-text-2); }
.feat-block li::before {
  content: ""; position: absolute; left: 2px; top: 14px;
  width: 8px; height: 8px; border-radius: 2px; background: var(--c-primary);
}
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); font-size: 15px; }
.spec-table th, .spec-table td { padding: 13px 18px; text-align: left; border-bottom: 1px solid var(--c-border); }
.spec-table th { background: var(--c-bg-soft); font-weight: 700; width: 210px; color: var(--c-text); }
.spec-table tr:last-child td { border-bottom: 0; }

/* ---------- 下载平台卡片 ---------- */
.dl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.dl-card {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow); display: flex; flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.dl-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.dl-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.dl-icon {
  width: 50px; height: 50px; border-radius: 12px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.dl-icon svg { width: 25px; height: 25px; stroke-width: 1.8; fill: none; }
.dl-icon.win { background: rgba(60, 102, 172, 0.12); } .dl-icon.win svg { stroke: #3C66AC; }
.dl-icon.linux { background: rgba(51, 65, 85, 0.12); } .dl-icon.linux svg { stroke: #33415C; }
.dl-icon.mac { background: rgba(77, 78, 84, 0.12); } .dl-icon.mac svg { stroke: #4D4E54; }
.dl-icon.android { background: rgba(61, 142, 68, 0.13); } .dl-icon.android svg { stroke: #3D8E44; }
.dl-card h3 { font-size: 19px; font-weight: 700; }
.dl-card .dl-meta { font-size: 13px; color: var(--c-text-3); }
.dl-card ul { list-style: none; padding: 0; margin-bottom: 20px; flex: 1; }
.dl-card li { padding: 4px 0 4px 22px; position: relative; font-size: 14.5px; color: var(--c-text-2); }
.dl-card li::before {
  content: ""; position: absolute; left: 0; top: 12px; width: 8px; height: 8px;
  border-radius: 2px; background: var(--c-primary);
}
.dl-card .btn { width: 100%; }

/* ---------- 步骤（教程页） ---------- */
.steps { counter-reset: step; display: grid; gap: 20px; }
.step {
  display: grid; grid-template-columns: 52px 1fr; gap: 18px;
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius);
  padding: 26px 28px; box-shadow: var(--shadow);
}
.step-num {
  counter-increment: step; width: 52px; height: 52px; border-radius: 14px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  color: #fff; font-size: 21px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.step-num::before { content: counter(step); }
.step h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.step p, .step li { font-size: 15px; color: var(--c-text-2); }
.step code {
  background: var(--c-primary-08); color: var(--c-primary-dark);
  padding: 2px 8px; border-radius: 6px; font-size: 13.5px; font-family: Consolas, "Courier New", monospace;
}
.step ul { margin-top: 6px; }

/* ---------- 提示框 ---------- */
.note {
  border-left: 4px solid var(--c-accent); background: #FFFDF4;
  border-radius: 0 10px 10px 0; padding: 16px 20px; margin: 22px 0; font-size: 14.5px; color: var(--c-text-2);
}
.note strong { color: var(--c-text); }
.note.warn { border-left-color: var(--c-primary-dark); background: #FFF6F0; }

/* ---------- FAQ ---------- */
.faq-list { display: grid; gap: 14px; max-width: 860px; margin: 0 auto; }
details.faq {
  background: #fff; border: 1px solid var(--c-border); border-radius: 12px;
  padding: 0 22px; box-shadow: var(--shadow);
}
details.faq summary {
  cursor: pointer; list-style: none; padding: 17px 0; font-weight: 700; font-size: 16px;
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+"; font-size: 21px; font-weight: 600; color: var(--c-primary);
  transition: transform 0.2s ease; flex-shrink: 0;
}
details.faq[open] summary::after { transform: rotate(45deg); }
details.faq .faq-body { padding: 0 0 18px; color: var(--c-text-2); font-size: 15px; }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--c-primary-dark) 0%, var(--c-primary) 62%, #FB8B33 100%);
  border-radius: 22px; padding: 54px 48px; text-align: center; color: #fff;
  box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; right: -70px; top: -70px; width: 240px; height: 240px;
  border-radius: 50%; background: rgba(255, 255, 255, 0.10);
}
.cta-band::after {
  content: ""; position: absolute; left: -50px; bottom: -90px; width: 200px; height: 200px;
  border-radius: 50%; background: rgba(253, 201, 33, 0.22);
}
.cta-band h2 { font-size: 30px; font-weight: 800; margin-bottom: 12px; position: relative; z-index: 1; }
.cta-band p { margin-bottom: 28px; font-size: 16.5px; opacity: 0.94; position: relative; z-index: 1; }
.cta-band .btn { background: #fff; color: var(--c-primary-dark); position: relative; z-index: 1; }
.cta-band .btn:hover { box-shadow: 0 8px 22px rgba(0, 0, 0, 0.22); }

/* ---------- 页面通用头 ---------- */
.page-head { background: var(--c-bg-soft); border-bottom: 1px solid var(--c-border); padding: 58px 0 50px; }
.page-head h1 { font-size: 34px; font-weight: 800; letter-spacing: -0.4px; }
.page-head .crumb { font-size: 13.5px; color: var(--c-text-3); margin-bottom: 10px; }
.page-head .crumb a { color: var(--c-text-3); }
.page-head .crumb a:hover { color: var(--c-primary-dark); }
.page-head p.lead { color: var(--c-text-2); margin-top: 12px; max-width: 760px; font-size: 16.5px; }

/* ---------- 正文排版 ---------- */
.prose { max-width: 860px; margin: 0 auto; }
.prose h2 { font-size: 25px; font-weight: 800; margin: 46px 0 16px; letter-spacing: -0.3px; }
.prose h3 { font-size: 19px; font-weight: 700; margin: 30px 0 10px; }
.prose p { color: var(--c-text-2); margin-bottom: 14px; }
.prose ul li, .prose ol li { color: var(--c-text-2); margin-bottom: 7px; }
.prose strong { color: var(--c-text); }

/* ---------- 页脚 ---------- */
.site-footer { background: #241A10; color: #CDBBA8; margin-top: 76px; }
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 36px; padding: 56px 0 40px;
}
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-brand img { width: 38px; height: 38px; border-radius: 9px; }
.footer-brand span { font-size: 19px; font-weight: 800; color: #fff; }
.site-footer p { font-size: 13.5px; line-height: 1.8; }
.site-footer h4 { color: #fff; font-size: 14.5px; font-weight: 700; margin-bottom: 14px; letter-spacing: 0.5px; }
.site-footer ul { list-style: none; padding: 0; }
.site-footer li { margin-bottom: 9px; }
.site-footer li a { color: #CDBBA8; font-size: 14px; }
.site-footer li a:hover { color: var(--c-accent); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.09); padding: 20px 0;
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; font-size: 12.5px; color: #9A8875;
}

/* ---------- 下载弹窗 ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(36, 26, 16, 0.55);
  display: flex; align-items: center; justify-content: center; padding: 22px;
  opacity: 0; visibility: hidden; transition: opacity 0.22s ease, visibility 0.22s ease; z-index: 200;
}
.modal-overlay.open { opacity: 1; visibility: visible; }
.modal {
  background: #fff; border-radius: 20px; max-width: 620px; width: 100%;
  max-height: 92vh; overflow-y: auto; box-shadow: 0 24px 70px rgba(0, 0, 0, 0.3);
  transform: translateY(16px) scale(0.97); transition: transform 0.22s ease;
}
.modal-overlay.open .modal { transform: translateY(0) scale(1); }
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 26px 14px;
}
.modal-head h3 { font-size: 19px; font-weight: 800; }
.modal-head p { font-size: 13px; color: var(--c-text-3); }
.modal-close {
  background: var(--c-primary-08); border: 0; width: 36px; height: 36px; border-radius: 10px;
  cursor: pointer; font-size: 17px; color: var(--c-primary-dark); line-height: 1; flex-shrink: 0;
}
.modal-close:hover { background: var(--c-primary-12); }
.modal-body { padding: 8px 26px 26px; }
.qr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 12px 0 6px; }
.qr-item {
  border: 1.5px dashed var(--c-border); border-radius: 14px; padding: 22px 16px 18px;
  text-align: center; background: var(--c-bg-soft); transition: border-color 0.15s ease;
}
.qr-item:hover { border-color: var(--c-primary); }
.qr-box {
  width: 170px; height: 170px; margin: 0 auto 14px; background: #fff;
  border: 1px solid var(--c-border); border-radius: 10px; padding: 7px;
  display: flex; align-items: center; justify-content: center;
  color: var(--c-text-3); font-size: 12px;
}
.qr-box img { width: 100%; height: 100%; object-fit: contain; border-radius: 6px; }
.qr-item .qr-name { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.qr-item .qr-tip { font-size: 12.5px; color: var(--c-text-3); }
.qr-item .qr-tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--c-primary-dark); background: var(--c-primary-08); border-radius: 999px; padding: 2px 12px; margin-bottom: 12px; }
.modal-note { font-size: 12.5px; color: var(--c-text-3); text-align: center; margin-top: 14px; }

/* ---------- 移动端适配 ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; padding: 52px 0 60px; }
  .hero h1 { font-size: 34px; }
  .scene-grid, .adv-grid, .feat-grid, .dl-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .main-nav {
    position: absolute; top: 68px; left: 0; right: 0; background: #fff;
    flex-direction: column; padding: 12px 20px 18px; gap: 2px;
    border-bottom: 1px solid var(--c-border); box-shadow: var(--shadow-lg);
    display: none;
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-cta { text-align: center; }
}
@media (max-width: 560px) {
  .hero h1 { font-size: 29px; }
  .section { padding: 56px 0; }
  .section-head h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .cta-band { padding: 40px 24px; }
  .qr-grid { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .spec-table th, .spec-table td { padding: 11px 12px; font-size: 14px; }
  .spec-table th { width: 118px; }
}