/* 制单通官网样式：与软件界面同一品牌色 */
:root {
  --brand: #e5484d;
  --brand-dark: #c9353a;
  --brand-soft: #fdecec;
  --ink: #1d2433;
  --ink-2: #4a5263;
  --ink-3: #8a91a0;
  --line: #e6e8ee;
  --tint: #f6f7f9;
  --white: #fff;
  --radius: 14px;
  --shadow: 0 20px 50px -20px rgb(29 36 51 / 0.35);
  --font: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Segoe UI', 'Noto Sans SC', sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin: 0;
}

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}

.container.narrow {
  max-width: 820px;
}

.muted {
  color: var(--ink-3);
}

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 22px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
  white-space: nowrap;
}
.btn:active {
  transform: translateY(1px);
}
.btn-primary {
  background: var(--brand);
  color: #fff;
}
.btn-primary:hover {
  background: var(--brand-dark);
}
.btn-ghost {
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
}
.btn-ghost:hover {
  border-color: var(--ink-3);
}
.btn-light {
  background: #fff;
  color: var(--brand-dark);
}
.btn-sm {
  height: 36px;
  padding: 0 16px;
  font-size: 14px;
}
.btn-lg {
  height: 52px;
  padding: 0 28px;
  font-size: 16px;
}

/* ---- 顶部导航 ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgb(255 255 255 / 0.88);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.02em;
}
.nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 15px;
}
.nav a {
  color: var(--ink-2);
  text-decoration: none;
}
.nav a:hover {
  color: var(--brand);
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 0;
  background: none;
  padding: 10px 8px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  margin: 4px 0;
  background: var(--ink);
  border-radius: 2px;
}

/* ---- 首屏 ---- */
.hero {
  padding: 72px 0 88px;
  background: radial-gradient(1000px 500px at 85% -10%, var(--brand-soft), transparent 70%);
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: center;
}
.eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 600;
}
.hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  letter-spacing: 0.01em;
}
.accent {
  display: block;
  color: var(--brand);
}
.lead {
  margin: 22px 0 30px;
  font-size: 18px;
  color: var(--ink-2);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--ink-2);
}
.hero-points li::before {
  content: '✓';
  margin-right: 6px;
  color: var(--brand);
  font-weight: 700;
}
.hero-shot {
  margin: 0;
}

/* 截图外框：模拟桌面窗口 */
.window {
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.window-bar {
  display: flex;
  gap: 7px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  background: #f3f4f6;
}
.window-bar i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #d9dbe0;
}
.window-bar i:nth-child(1) {
  background: #ff5f57;
}
.window-bar i:nth-child(2) {
  background: #febc2e;
}
.window-bar i:nth-child(3) {
  background: #28c840;
}

/* ---- 通用区块 ---- */
.section {
  padding: 96px 0;
}
.section-tint {
  background: var(--tint);
}
.section-title {
  font-size: clamp(28px, 3.4vw, 38px);
  text-align: center;
}
.section-sub {
  margin: 12px auto 0;
  max-width: 640px;
  text-align: center;
  color: var(--ink-2);
}

/* ---- 痛点 ---- */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.pain {
  padding: 28px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}
.pain-before {
  margin: 0 0 12px;
  color: var(--ink-3);
  text-decoration: line-through;
  text-decoration-color: rgb(229 72 77 / 0.6);
}
.pain-after {
  margin: 0;
  font-weight: 500;
}

/* ---- 单据样张 ---- */
.tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 36px 0 32px;
  /* 样张较长，按钮吸顶在导航栏下方，看到一半也能直接切换 */
  position: sticky;
  top: 64px;
  z-index: 5;
  padding: 10px 0;
  background: rgb(255 255 255 / 0.92);
  backdrop-filter: blur(8px);
}
.tabs button {
  height: 40px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  font: inherit;
  font-size: 15px;
  cursor: pointer;
}
.tabs button[aria-selected='true'] {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
  font-weight: 600;
}
/* display:grid 会覆盖浏览器对 [hidden] 的隐藏，这里显式隐藏未选中的样张 */
.sample[hidden] {
  display: none;
}
.sample {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: center;
}
.sample h3 {
  font-size: 26px;
}
.sample-text p {
  color: var(--ink-2);
}
.checks {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}
.checks li {
  padding: 6px 0 6px 28px;
  position: relative;
}
.checks li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 13px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--brand-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 8.2l2.3 2.3 4.7-4.9' fill='none' stroke='%23e5484d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 14px no-repeat;
}
.sample-img {
  display: block;
  max-width: 460px;
  justify-self: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  box-shadow: var(--shadow);
  cursor: zoom-in;
  transition: transform 0.2s;
}
.sample-img:hover {
  transform: translateY(-4px);
}

/* ---- 功能 ---- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.feature {
  padding: 26px 26px 22px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}
.feature h3 {
  font-size: 18px;
  margin-bottom: 8px;
}
.feature h3::before {
  content: '';
  display: block;
  width: 28px;
  height: 4px;
  margin-bottom: 14px;
  border-radius: 2px;
  background: var(--brand);
}
.feature p {
  margin: 0;
  color: var(--ink-2);
  font-size: 15px;
}

/* ---- 隐私 ---- */
.privacy-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 44px;
}
.privacy-card {
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #fff;
}
.privacy-local {
  border-color: var(--brand);
  background: linear-gradient(180deg, var(--brand-soft), #fff 55%);
}
.privacy-tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--tint);
  color: var(--ink-2);
  font-size: 13px;
  font-weight: 600;
}
.privacy-local .privacy-tag {
  background: var(--brand);
  color: #fff;
}
.privacy-card h3 {
  margin: 0;
  font-size: 20px;
}
.privacy-card .checks {
  margin-top: 14px;
}
.privacy-foot {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 14px;
}
.privacy-more {
  margin: 20px 0 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 14px;
}

/* ---- 四步 ---- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 48px 0 56px;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.steps li {
  counter-increment: step;
  padding: 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}
.steps li::before {
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
}
.steps b {
  display: block;
  font-size: 17px;
}
.steps span {
  color: var(--ink-2);
  font-size: 14px;
}
.shots {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.shots figure {
  margin: 0;
}
.shots figcaption {
  margin-top: 14px;
  text-align: center;
  color: var(--ink-2);
  font-size: 14px;
}

/* ---- 版本 ---- */
.plans {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 860px;
  margin: 48px auto 0;
}
.plan {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 32px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}
.plan-pro {
  border: 2px solid var(--brand);
  box-shadow: var(--shadow);
}
.plan h3 {
  font-size: 20px;
}
.badge {
  position: absolute;
  top: -13px;
  right: 24px;
  margin: 0;
  padding: 2px 12px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}
.price {
  margin: 10px 0 18px;
  font-size: 30px;
  font-weight: 700;
}
.price small {
  display: block;
  font-size: 14px;
  font-weight: 400;
  color: var(--ink-3);
}
.plan ul {
  flex: 1;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}
.plan li {
  padding: 7px 0;
  border-bottom: 1px dashed var(--line);
  color: var(--ink-2);
  font-size: 15px;
}
.plan li b {
  color: var(--ink);
}

.buy {
  max-width: 860px;
  margin: 56px auto 0;
  padding: 32px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}
.buy h3 {
  font-size: 20px;
}
.buy-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 20px 0;
  padding: 0;
  list-style: none;
  counter-reset: buy;
}
.buy-steps li {
  counter-increment: buy;
  font-size: 14px;
  color: var(--ink-2);
}
.buy-steps b {
  display: block;
  margin-bottom: 2px;
  color: var(--ink);
}
.buy-steps b::before {
  content: counter(buy);
  margin-right: 6px;
  color: var(--brand);
}
.note {
  margin: 0 0 22px;
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--tint);
  color: var(--ink-2);
  font-size: 14px;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 22px;
}
.contact-card p {
  margin: 2px 0;
}
.qr {
  width: 132px;
  height: 132px;
  flex-shrink: 0;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--tint);
  object-fit: contain;
}
.qr.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---- 下载 ---- */
.downloads {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 44px;
}
.dl {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  text-decoration: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.dl:hover,
.dl.recommended {
  border-color: var(--brand);
  box-shadow: 0 10px 30px -18px rgb(229 72 77 / 0.7);
}
.dl-os {
  font-size: 19px;
  font-weight: 700;
}
.dl-desc {
  color: var(--ink-2);
  font-size: 14px;
}
.dl-meta {
  margin-top: 12px;
  color: var(--brand);
  font-weight: 600;
  font-size: 14px;
}
.dl-code {
  align-self: flex-start;
  margin-top: 4px;
  padding: 2px 10px;
  border-radius: 6px;
  background: var(--tint);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.dl.pending {
  cursor: default;
}
.dl.pending .dl-meta {
  color: var(--ink-3);
}
.dl.pending:hover {
  border-color: var(--line);
  box-shadow: none;
}
.checksum {
  margin-top: 24px;
  padding: 0 18px;
  border-radius: 12px;
  background: var(--tint);
  font-size: 14px;
}
.checksum[hidden] {
  display: none;
}
.checksum summary {
  padding: 14px 0;
  font-weight: 600;
  cursor: pointer;
}
.checksum p {
  margin: 0 0 12px;
  color: var(--ink-2);
}
.checksum dl {
  margin: 0 0 16px;
}
.checksum dt {
  margin-top: 8px;
  color: var(--ink-2);
}
.checksum dd {
  margin: 2px 0 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  overflow-wrap: anywhere;
}
.dl.recommended .dl-os::after {
  content: '本机推荐';
  margin-left: 8px;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 600;
  vertical-align: 3px;
}
.install-tips {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}
.install-tips details,
.faq details {
  border-radius: 12px;
  background: var(--tint);
  padding: 14px 18px;
}
.faq details {
  background: #fff;
  border: 1px solid var(--line);
}
details summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}
details summary::-webkit-details-marker {
  display: none;
}
details summary::after {
  content: '+';
  float: right;
  color: var(--ink-3);
  font-weight: 400;
}
details[open] summary::after {
  content: '–';
}
details p {
  margin: 10px 0 2px;
  color: var(--ink-2);
  font-size: 15px;
}
.install-tips summary {
  font-size: 14px;
}
.install-tips p {
  font-size: 14px;
}
.faq {
  display: grid;
  gap: 12px;
  margin-top: 40px;
}

/* ---- 底部 CTA 与页脚 ---- */
.cta {
  padding: 72px 0;
  background: linear-gradient(120deg, var(--brand), var(--brand-dark));
  color: #fff;
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.cta h2 {
  font-size: clamp(26px, 3vw, 34px);
}
.site-footer {
  padding: 44px 0 28px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-links {
  display: flex;
  gap: 22px;
}
.footer-links a,
.icp {
  color: var(--ink-2);
  text-decoration: none;
}
.footer-links a:hover,
.icp:hover {
  color: var(--brand);
}
.footer-bottom {
  display: flex;
  gap: 18px;
  margin-top: 26px;
  color: var(--ink-3);
  font-size: 13px;
}

/* ---- 图片放大 ---- */
.lightbox {
  max-width: min(92vw, 900px);
  max-height: 92vh;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: #fff;
}
.lightbox::backdrop {
  background: rgb(15 18 25 / 0.72);
}
.lightbox img {
  width: 100%;
}
.lightbox-close {
  position: sticky;
  top: 8px;
  float: right;
  margin: 8px 8px -48px 0;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: rgb(29 36 51 / 0.75);
  color: #fff;
  font-size: 24px;
  cursor: pointer;
}

/* ---- 法律页面 ---- */
.legal {
  padding: 64px 0 96px;
}
.legal h1 {
  font-size: 32px;
}
.legal h2 {
  margin: 36px 0 10px;
  font-size: 20px;
}
.legal p,
.legal li {
  color: var(--ink-2);
}
.legal .updated {
  color: var(--ink-3);
  font-size: 14px;
}

/* ---- 平板与手机 ---- */
@media (max-width: 960px) {
  .hero-inner,
  .sample {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero {
    padding: 48px 0 64px;
  }
  .pain-grid,
  .feature-grid,
  .downloads,
  .install-tips {
    grid-template-columns: 1fr 1fr;
  }
  .steps,
  .buy-steps {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  /* 手机上按钮占两行，吸顶会挡住太多内容 */
  .tabs {
    position: static;
    padding: 0;
  }
  .nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 8px 20px 16px;
    background: #fff;
    border-bottom: 1px solid var(--line);
  }
  .nav.open {
    display: flex;
  }
  .nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
  }
  .nav-toggle {
    display: block;
    margin-left: auto;
  }
  .header-cta {
    display: none;
  }
  .section {
    padding: 64px 0;
  }
  .pain-grid,
  .feature-grid,
  .privacy-split,
  .downloads,
  .install-tips,
  .shots,
  .plans,
  .steps,
  .buy-steps {
    grid-template-columns: 1fr;
  }
  .lead {
    font-size: 16px;
  }
  .buy,
  .plan {
    padding: 24px 20px;
  }
  .contact-card {
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 6px;
  }
}