/* AutoBroom 官网 — 中等宽度，留白适中，兼容老系统 */
:root {
  --jade: #0c8f89;
  --jade-dark: #08706b;
  --ink: #1a2423;
  --mute: #5a6a67;
  --line: #d5e0dd;
  --bg: #eef3f2;
  --card: #ffffff;
  --max: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
}

a {
  color: var(--jade-dark);
}

a:hover {
  color: #055a56;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 0;
}

.inner {
  width: var(--max);
  max-width: 94%;
  margin: 0 auto;
}

/* 顶栏 */
.site-top {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.top-row {
  height: 60px;
  display: flex;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  font-size: 18px;
  margin-right: auto;
}

.brand img {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  object-fit: contain;
  display: block;
}

.nav a {
  margin-left: 18px;
  text-decoration: none;
  color: var(--mute);
  font-size: 14px;
}

.nav a:hover {
  color: var(--jade-dark);
}

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  vertical-align: middle;
}

.btn-sm {
  margin-left: 18px;
  padding: 7px 14px;
  background: var(--jade);
  color: #fff;
  border-color: var(--jade);
}

.btn-sm:hover {
  background: var(--jade-dark);
  color: #fff;
}

.btn-primary {
  background: var(--jade);
  color: #fff;
  border-color: var(--jade);
}

.btn-primary:hover {
  background: var(--jade-dark);
  color: #fff;
}

.btn-ghost {
  background: #fff;
  color: var(--jade-dark);
  border-color: var(--line);
  margin-left: 10px;
}

.btn-ghost:hover {
  border-color: var(--jade);
  color: var(--jade-dark);
}

/* 首屏：适中双栏，非巨型字 */
.hero {
  background: linear-gradient(180deg, #e4efed 0%, var(--bg) 100%);
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--line);
}

.hero-box {
  display: flex;
  align-items: center;
  gap: 40px;
}

.hero-text {
  flex: 1 1 52%;
  min-width: 0;
}

.hero-pic {
  flex: 1 1 48%;
  min-width: 0;
}

.hero-brand {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--jade-dark);
}

.hero h1 {
  margin: 0 0 14px;
  font-size: 28px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--ink);
}

.hero-desc {
  margin: 0 0 10px;
  color: var(--mute);
  font-size: 15px;
  max-width: 32em;
}

.hero-note {
  margin: 0 0 20px;
  font-size: 13px;
  color: var(--jade);
  font-weight: 600;
}

.hero-actions {
  margin: 0 0 12px;
}

.hero-meta {
  margin: 0;
  font-size: 13px;
  color: var(--mute);
}

.hero-pic img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #111;
  box-shadow: 0 12px 28px rgba(8, 80, 76, 0.1);
}

/* 区块 */
.section {
  padding: 42px 0;
  background: var(--card);
}

.section-alt {
  background: #f5f9f8;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section h2 {
  margin: 0 0 22px;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.cols3 {
  display: flex;
  gap: 24px;
  counter-reset: mark;
}

.col {
  flex: 1;
  min-width: 0;
  padding: 18px 16px;
  background: #f5f9f8;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.section-alt .col {
  background: #fff;
}

.col h3 {
  margin: 0 0 8px;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.col h3::before {
  counter-increment: mark;
  content: counter(mark);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--jade);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0;
}

.col p {
  margin: 0;
  font-size: 14px;
  color: var(--mute);
}

.feature {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.feature:last-child {
  border-bottom: 1px solid var(--line);
}

#ability .inner {
  counter-reset: mark;
}

.feature h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--jade-dark);
  display: flex;
  align-items: center;
  gap: 10px;
}

.feature h3::before {
  counter-increment: mark;
  content: counter(mark);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--jade);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  line-height: 24px;
  text-align: center;
}

.feature p {
  margin: 0;
  color: var(--mute);
  font-size: 14px;
  max-width: 52em;
}

.step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 20px;
}

.step-list li {
  flex: 1;
  display: flex;
  gap: 12px;
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f5f9f8;
}

.step-list span {
  flex: 0 0 28px;
  height: 28px;
  line-height: 28px;
  text-align: center;
  background: var(--jade);
  color: #fff;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
}

.step-list strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
}

.step-list p {
  margin: 0;
  font-size: 13px;
  color: var(--mute);
}

.faq-list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.faq-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.faq-q,
.faq-a {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.faq-q {
  margin-bottom: 10px;
}

.faq-q span,
.faq-a span {
  flex: 0 0 26px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  font-size: 12px;
  font-weight: 700;
  line-height: 26px;
  text-align: center;
  letter-spacing: 0;
}

.faq-q span {
  background: var(--jade);
  color: #fff;
}

.faq-a span {
  background: #e8f3f1;
  color: var(--jade-dark);
  border: 1px solid var(--line);
}

.faq-q p,
.faq-a p {
  margin: 0;
  padding-top: 2px;
  flex: 1;
  min-width: 0;
}

.faq-q p {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.faq-a p {
  font-size: 14px;
  color: var(--mute);
  line-height: 1.7;
}

.faq {
  margin: 0;
  max-width: 720px;
}

.faq dt {
  margin-top: 14px;
  font-weight: 700;
  font-size: 15px;
}

.faq dt:first-child {
  margin-top: 0;
}

.faq dd {
  margin: 6px 0 0;
  color: var(--mute);
  font-size: 14px;
}

.cta {
  padding: 48px 0;
  background: linear-gradient(180deg, #dcebe9 0%, #d0e4e1 100%);
  text-align: center;
}

.cta h2 {
  margin: 0 0 8px;
  font-size: 24px;
}

.cta p {
  margin: 0 0 18px;
  color: var(--mute);
}

.cta .btn-ghost {
  background: rgba(255, 255, 255, 0.7);
}

.site-foot {
  padding: 28px 0 32px;
  background: #1a2a28;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
}

.site-foot a {
  color: #9fd4d0;
  text-decoration: none;
  margin-right: 14px;
}

.site-foot a:hover {
  color: #fff;
}

.foot-brand {
  margin: 0 0 10px;
  color: #fff;
  font-weight: 700;
}

.foot-links {
  margin: 0 0 12px;
}

.foot-copy {
  margin: 0;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.5);
}

.foot-copy a {
  color: rgba(255, 255, 255, 0.55);
}

/* —— 内页（帮助 / 关于 / 隐私） —— */
.doc-wrap {
  padding: 28px 0 48px;
}

.doc-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px 32px 36px;
}

.doc-panel h1 {
  margin: 0 0 12px;
  font-size: 26px;
}

.doc-lead {
  margin: 0 0 22px;
  color: var(--mute);
  font-size: 15px;
  max-width: 46em;
}

.doc-panel h2 {
  margin: 26px 0 10px;
  font-size: 18px;
  padding-left: 10px;
  border-left: 3px solid var(--jade);
}

.doc-panel h3 {
  margin: 18px 0 8px;
  font-size: 15px;
}

.doc-panel p,
.doc-panel li {
  color: #3d4a48;
  font-size: 14px;
}

.doc-panel ul,
.doc-panel ol {
  margin: 0 0 12px;
  padding-left: 22px;
}

.doc-panel li {
  margin-bottom: 6px;
}

.doc-callout {
  margin: 14px 0;
  padding: 12px 14px;
  background: #f3f8f7;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 13px;
  color: var(--mute);
}

.doc-callout strong {
  color: var(--jade-dark);
}

.doc-toc {
  margin: 0 0 22px;
  padding: 12px 14px;
  background: #f5f9f8;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 13px;
}

.doc-toc a {
  margin-right: 12px;
  text-decoration: none;
  white-space: nowrap;
  line-height: 2;
}

.doc-actions {
  margin-top: 24px;
}

#result.is-ok,
#result.is-err {
  padding: 14px 16px;
  border-radius: 6px;
  font-size: 14px;
}

#result.is-ok {
  background: #f0faf8;
  border: 1px solid var(--line);
}

#result.is-err {
  background: #faf6f0;
  border: 1px solid #e8d9c8;
}

#result .username {
  font-size: 18px;
  font-weight: 700;
  margin: 8px 0;
}

#result .meta {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--mute);
}

.prose-block {
  margin-bottom: 18px;
}

.prose-block p {
  margin: 0 0 10px;
  color: var(--mute);
  font-size: 14px;
  max-width: 52em;
}

/* 介绍区 — 简约 */
.intro-lead {
  margin: 0 0 28px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
}

.intro-grid {
  display: flex;
  gap: 0;
  border-top: 1px solid var(--line);
  counter-reset: mark;
}

.intro-item {
  flex: 1;
  min-width: 0;
  padding: 22px 24px 22px 0;
  border-right: 1px solid var(--line);
}

.intro-item:last-child {
  border-right: 0;
  padding-right: 0;
}

.intro-item:first-child {
  padding-left: 0;
}

.intro-item + .intro-item {
  padding-left: 24px;
}

.intro-item h3 {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--jade-dark);
  display: flex;
  align-items: center;
  gap: 10px;
}

.intro-item h3::before {
  counter-increment: mark;
  content: counter(mark);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--jade);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 24px;
  text-align: center;
}

.intro-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mute);
}

.intro-item code {
  font-size: 13px;
  color: var(--ink);
  background: #f3f8f7;
  padding: 1px 6px;
  border-radius: 3px;
}

.intro-note {
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.8;
  color: var(--mute);
}

.intro-note a {
  text-decoration: none;
  margin-left: 2px;
}

.intro-note a:hover {
  text-decoration: underline;
}

.intro-note .sep {
  margin: 0 6px;
  color: var(--line);
}

.tag-list {
  margin: 0;
  padding: 0;
  list-style: none;
  overflow: hidden;
}

.tag-list li {
  float: left;
  margin: 0 8px 8px 0;
  padding: 5px 10px;
  background: #f3f8f7;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-size: 13px;
  color: var(--jade-dark);
}

@media screen and (max-width: 900px) {
  .nav {
    display: none;
  }

  .hero-box {
    flex-direction: column;
    gap: 28px;
  }

  .hero h1 {
    font-size: 24px;
  }

  .cols3,
  .step-list,
  .intro-grid {
    flex-direction: column;
  }

  .intro-item,
  .intro-item + .intro-item {
    padding: 18px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .intro-item:last-child {
    border-bottom: 0;
  }

  .btn-ghost {
    margin-left: 0;
    margin-top: 8px;
  }

  .hero-actions .btn-ghost {
    display: inline-block;
  }

  .doc-panel {
    padding: 20px 16px 28px;
  }
}

@media screen and (max-width: 480px) {
  .top-row {
    height: auto;
    padding: 12px 0;
    flex-wrap: wrap;
    gap: 8px;
  }

  .btn-sm {
    margin-left: auto;
  }
}