:root {
  --mint: #e8f5e9;
  --mint-deep: #c8e6c9;
  --ink: #1b1f1a;
  --ink-soft: #3d453c;
  --line: #9ccc9a;
  --paper: #f4faf4;
  --bar: #2e7d32;
  --bar-track: #d7ecd8;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--mint);
  color: var(--ink);
  line-height: 1.75;
}

a {
  color: var(--ink);
}

.mast {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 6vw;
  background: var(--ink);
  color: #f4faf4;
}

.mast a {
  color: #f4faf4;
  text-decoration: none;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.04em;
}

.mast nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  font-size: 0.92rem;
}

.mast nav a:hover {
  text-decoration: underline;
}

.hero {
  padding: 3.2rem 6vw 2.4rem;
  max-width: 58rem;
}

.hero p {
  margin: 0 0 0.85rem;
  color: var(--ink-soft);
}

.hero time {
  display: inline-block;
  margin-top: 0.4rem;
  font-size: 0.88rem;
  color: #4a5548;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: 0 6vw 2.4rem;
  border: 1px solid var(--line);
  background: var(--paper);
}

.split article {
  padding: 1.6rem 1.5rem 1.8rem;
}

.split article:first-child {
  border-right: 1px solid var(--line);
}

.split h2 {
  margin-top: 0;
}

.tick,
.cross {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.tick li,
.cross li {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  margin-bottom: 0.85rem;
}

.tick svg,
.cross svg {
  flex: 0 0 1.15rem;
  margin-top: 0.28rem;
}

.degree,
.cases,
.steps,
.bound,
.grid-sec,
.backphone,
.faq {
  margin: 0 6vw 2.6rem;
}

.degree,
.cases,
.steps,
.bound,
.grid-sec,
.backphone,
.faq {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 1.6rem 1.5rem 1.9rem;
}

.meter {
  margin: 1.1rem 0 1.25rem;
}

.meter span {
  display: block;
  font-size: 0.92rem;
  margin-bottom: 0.35rem;
}

.track {
  height: 0.7rem;
  background: var(--bar-track);
  border-radius: 0;
}

.fill {
  height: 100%;
  background: var(--bar);
}

.fill.w95 { width: 95%; }
.fill.w86 { width: 86%; }
.fill.w78 { width: 78%; }
.fill.w72 { width: 72%; }
.fill.w34 { width: 34%; }
.fill.w12 { width: 12%; }
.fill.w0 { width: 0%; }

.case-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.case {
  padding: 1rem 1rem 0.2rem;
  background: var(--mint);
  border-left: 4px solid var(--bar);
}

.stepbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 1.2rem 0;
  counter-reset: st;
}

.stepbar li {
  list-style: none;
  flex: 1 1 12rem;
  padding: 0.9rem 0.8rem 0.9rem 2.4rem;
  position: relative;
  background: var(--mint);
  border-right: 1px solid var(--line);
  min-height: 5.5rem;
}

.stepbar li::before {
  counter-increment: st;
  content: counter(st);
  position: absolute;
  left: 0.65rem;
  top: 0.95rem;
  width: 1.3rem;
  height: 1.3rem;
  background: var(--ink);
  color: #e8f5e9;
  text-align: center;
  font-size: 0.8rem;
  line-height: 1.3rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  border: 1px solid var(--line);
  padding: 0.65rem 0.7rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--mint-deep);
}

.cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.card {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 0.7rem;
  padding: 0.9rem 0.8rem;
  background: var(--mint);
}

.card svg {
  margin-top: 0.2rem;
}

details {
  border-bottom: 1px solid var(--line);
  padding: 0.7rem 0;
}

summary {
  cursor: pointer;
  font-weight: 600;
}

details p {
  margin: 0.55rem 0 0.2rem;
}

.foot {
  background: var(--ink);
  color: #d7ecd8;
  padding: 1.8rem 6vw 2.2rem;
  font-size: 0.92rem;
}

.foot p {
  margin: 0 0 0.55rem;
}

@media (max-width: 820px) {
  .split,
  .case-row,
  .cards {
    grid-template-columns: 1fr;
  }

  .split article:first-child {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .stepbar li {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}