:root {
  --bg: #F6FFFB;
  --teal: #128C7E;
  --title: #0E7C66;
  --ink: #16332C;
  --muted: #3D5A52;
  --card: #FFFFFF;
  --band: #D8F3EA;
  --warn: #E8F4C8;
}

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

html { scroll-behavior: auto; }

body {
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
}

a { color: var(--title); text-decoration: none; }

svg { display: block; }

.wrap {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

/* 顶栏：白底、左侧 8px 竖条、居中、不 sticky */
.site-header {
  background: #fff;
  border-left: 8px solid var(--teal);
  box-shadow: 0 1px 0 #D5E8E2;
}

.site-header .inner {
  text-align: center;
  padding: 18px 16px 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--title);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.brand svg { width: 28px; height: 28px; }

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
}

.nav a {
  color: var(--muted);
  font-size: 14px;
  padding: 2px 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a:focus {
  color: var(--title);
  border-bottom-color: var(--teal);
}

.hero {
  padding: 36px 0 8px;
  text-align: center;
}

.hero h1 {
  font-size: 30px;
  color: var(--title);
  margin-bottom: 12px;
  font-weight: 700;
}

.hero p {
  max-width: 40em;
  margin: 0 auto 8px;
  color: var(--muted);
}

.hero .btn-row { margin-top: 16px; }

.btn {
  display: inline-block;
  background: var(--teal);
  color: #fff;
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 14px;
}

.btn:hover { background: #0B6B5F; }

/* 痛点横带 */
.pain-band {
  background: var(--band);
  border-top: 1px solid #BFE6D8;
  border-bottom: 1px solid #BFE6D8;
  padding: 16px 0;
  margin: 20px 0 8px;
}

.pain-band ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  list-style: none;
}

.pain-band li {
  flex: 1 1 220px;
  background: #fff;
  padding: 10px 12px;
  font-size: 14px;
  border-left: 4px solid #E3B23C;
}

section { padding: 40px 0; }

section h2 {
  font-size: 24px;
  color: var(--title);
  text-align: center;
  margin-bottom: 8px;
}

.sub {
  text-align: center;
  color: var(--muted);
  margin-bottom: 22px;
}

/* 3 列卡点 */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.pain-card {
  background: var(--card);
  padding: 22px 18px 20px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(18, 140, 126, 0.08);
  text-align: left;
}

.pain-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--band);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}

.pain-card svg { width: 24px; height: 24px; color: var(--teal); }

.pain-card h3 { font-size: 17px; margin-bottom: 8px; }

.pain-card p { font-size: 14px; color: var(--muted); }

/* 2 列接住 */
.catch-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.catch-box {
  background: #fff;
  padding: 22px;
  border-radius: 0 16px 16px 0;
  border-left: 10px solid var(--teal);
}

.catch-box h3 { margin-bottom: 8px; font-size: 18px; }

.catch-box p { color: var(--muted); font-size: 15px; }

/* 纵向时间线 */
.timeline {
  position: relative;
  padding-left: 36px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: #A8D5CC;
}

.tl-item { position: relative; margin-bottom: 22px; }

.tl-item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--teal);
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--teal);
}

.tl-item h3 { font-size: 17px; margin-bottom: 4px; }

.tl-item p { color: var(--muted); font-size: 15px; }

/* 3 列收益 */
.gain-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.gain {
  background: var(--warn);
  padding: 20px;
  border-radius: 8px;
}

.gain svg { width: 26px; height: 26px; margin-bottom: 8px; color: var(--title); }

.gain h3 { font-size: 16px; margin-bottom: 6px; }

.gain p { font-size: 14px; color: var(--muted); }

/* 未读节奏板 */
.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid #C5E4DC;
  background: #fff;
}

.board-col { padding: 16px; }

.board-col + .board-col { border-left: 1px solid #C5E4DC; }

.board-col header {
  font-weight: 700;
  color: #fff;
  background: var(--teal);
  margin: -16px -16px 12px;
  padding: 8px 12px;
  font-size: 14px;
}

.board-col:nth-child(2) header { background: #0E7C66; }

.board-col:nth-child(3) header { background: #0A5C4E; }

.board-col li { margin: 8px 0 8px 1.1em; font-size: 14px; color: var(--muted); }

/* 文件路径 4 卡 */
.file-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.file-card {
  background: #fff;
  padding: 16px 12px;
  text-align: center;
  border-top: 5px solid var(--teal);
}

.file-card svg { width: 28px; height: 28px; margin: 0 auto 8px; color: var(--teal); }

.file-card h3 { font-size: 15px; margin-bottom: 6px; }

.file-card p { font-size: 13px; color: var(--muted); text-align: left; }

/* 适用条件双栏 */
.cond-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.cond {
  background: #fff;
  padding: 20px;
  min-height: 180px;
}

.cond.yes { outline: 2px solid var(--teal); }

.cond.no { outline: 2px solid #C4A35A; }

.cond h3 { margin-bottom: 8px; }

.cond p { font-size: 14px; color: var(--muted); }

/* FAQ details */
.faq-list details {
  background: #fff;
  margin-bottom: 8px;
  border: 1px solid #C5E4DC;
}

.faq-list summary {
  cursor: pointer;
  padding: 12px 14px;
  color: var(--title);
  font-weight: 600;
  list-style: none;
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-list summary::before {
  content: "+";
  display: inline-block;
  width: 1.2em;
  color: var(--teal);
}

.faq-list details[open] summary::before { content: "-"; }

.faq-list details p {
  padding: 0 14px 14px 32px;
  color: var(--muted);
  font-size: 15px;
}

.site-footer {
  background: #0A3D36;
  color: #D5EDE8;
  padding: 28px 16px 36px;
  text-align: center;
  font-size: 13px;
}

.site-footer p { margin: 8px auto; max-width: 52em; }

@media (max-width: 860px) {
  .pain-grid,
  .catch-2,
  .gain-3,
  .board,
  .file-row,
  .cond-2 { grid-template-columns: 1fr; }
  .board-col + .board-col { border-left: 0; border-top: 1px solid #C5E4DC; }
}