/* 新能源汽车技术课程页面样式 */

:root {
  --ink:#16171a;
  --gray:#3d3e3f;
  --muted:#707275;
  --line:#dededb;
  --paper:#f7f7f5;
  --red:#d02928;
}

* {
  box-sizing:border-box;
}

html {
  scroll-behavior:smooth;
  scroll-padding-top:100px;
}

body {
  margin:0;
  color:var(--ink);
  background:white;
  font:16px/1.85 'Source Han Sans SC','Microsoft YaHei','PingFang SC',sans-serif;
}

a {
  color:inherit;
  text-decoration:none;
}

button {
  font:inherit;
}

header {
  height:90px;
  border-bottom:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 5%;
  background:#fff;
  position:sticky;
  top:0;
  z-index:10;
}

header img {
  width:174px;
  display:block;
}

nav {
  display:flex;
  gap:30px;
  font-size:14px;
}

nav a:hover {
  border-bottom:1px solid;
}

main {
  overflow:hidden;
}

.wrap {
  width:min(1200px,90%);
  margin:auto;
}

.eyebrow {
  font:12px/1.4 monospace;
  letter-spacing:2px;
  color:var(--muted);
  text-transform:uppercase;
}

.hero {
  padding:80px 0 0;
  background:var(--paper);
}

.hero-grid {
  display:grid;
  grid-template-columns:1.2fr 1fr;
  gap:70px;
  align-items:center;
}

.hero h1 {
  font-size:clamp(42px,4.9vw,70px);
  line-height:1.15;
  letter-spacing:-3px;
  margin:25px 0;
  transform:skewX(-6deg);
}

.hero p {
  max-width:580px;
  color:var(--gray);
}

.btn {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:35px;
  padding:12px 25px;
  background:var(--red);
  color:#fff;
  margin:20px 0 35px;
  border:1px solid var(--red);
}

.secondary {
  margin-left:15px;
  background:transparent;
  color:var(--ink);
  border-color:var(--line);
}

.schematic {
  height:350px;
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
}

.schematic img {
  width:100%;
  height:100%;
}

.caption {
  position:absolute;
  bottom:0;
  right:0;
  font-size:11px;
  color:var(--muted);
}

.stats {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  margin-top:55px;
  padding:30px 0;
}

.stat {
  padding-left:24px;
  border-left:1px solid var(--line);
}

.stat:first-child {
  padding:0;
  border:0;
}

.stat b {
  font:38px/1.2 monospace;
}

.stat span {
  display:block;
  font-size:13px;
  color:var(--gray);
  margin-top:8px;
}

section {
  padding:90px 0;
}

.section-head {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:50px;
  align-items:end;
  margin-bottom:40px;
}

h2 {
  font-size:36px;
  line-height:1.35;
  margin:15px 0 0;
  letter-spacing:-1px;
}

h3 {
  font-size:22px;
  margin:10px 0;
}

p {
  margin:10px 0;
}

.intro {
  color:var(--gray);
  max-width:560px;
}

.pill {
  font-size:12px;
  border:1px solid var(--line);
  padding:4px 10px;
  display:inline-block;
  margin:8px 7px 0 0;
}

.outcomes {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--line);
}

.outcome {
  padding:28px 30px 10px 0;
}

.outcome span {
  font:13px monospace;
  color:var(--muted);
}

.outcome p {
  font-size:14px;
  color:var(--gray);
}

.curriculum {
  background:var(--paper);
}

.tabs {
  display:flex;
  border-bottom:1px solid var(--line);
  gap:35px;
  margin:30px 0;
}

.tabs button {
  border:0;
  background:none;
  padding:12px 0;
  color:var(--muted);
  cursor:pointer;
  border-bottom:3px solid transparent;
}

.tabs button.active {
  color:var(--ink);
  border-color:var(--ink);
  font-weight:bold;
}

.courses {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0 40px;
}

.course {
  border-bottom:1px solid var(--line);
}

summary {
  list-style:none;
  display:flex;
  gap:20px;
  align-items:center;
  padding:25px 0;
  cursor:pointer;
}

summary::-webkit-details-marker {
  display:none;
}

.num {
  font:14px monospace;
  color:var(--muted);
}

summary strong {
  display:block;
  font-size:18px;
}

summary small {
  font-size:13px;
  color:var(--muted);
  display:block;
  margin-top:5px;
}

.plus {
  margin-left:auto;
  font-size:22px;
}

.course[open] .plus {
  transform:rotate(45deg);
}

.detail {
  padding:0 20px 25px 38px;
  font-size:14px;
}

.muted {
  color:var(--muted);
  font-size:13px;
}

.note {
  border-left:2px solid var(--ink);
  padding-left:18px;
  margin-top:32px;
  color:var(--muted);
  font-size:13px;
}

.resources {
  display:grid;
  grid-template-columns:1fr 1.3fr;
  gap:70px;
}

.resource-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}

.resource {
  padding:25px 20px;
  background:#fff;
}

.resource em {
  font:12px monospace;
  color:var(--muted);
}

.resource h3 {
  font-size:17px;
}

.resource p {
  font-size:13px;
  color:var(--gray);
}

.projects {
  background:var(--ink);
  color:#ededeb;
}

.projects .eyebrow,.projects .intro {
  color:#b9baba;
}

.project-list {
  border-top:1px solid #5a5c5e;
}

.project {
  display:grid;
  grid-template-columns:60px 1fr 1fr;
  gap:25px;
  padding:28px 0;
  border-bottom:1px solid #5a5c5e;
}

.project h3 {
  margin:0;
  font-size:21px;
}

.project p {
  font-size:14px;
  color:#c9c9c6;
  margin:0;
}

.project .index {
  font:16px monospace;
  color:#a0a1a1;
}

.steps {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:30px;
  margin:45px 0;
}

.step {
  border-top:1px solid var(--ink);
  padding-top:20px;
}

.step b {
  font:30px monospace;
}

.step p {
  font-size:14px;
  color:var(--gray);
}

.extend {
  background:var(--paper);
  padding:30px;
  display:flex;
  gap:45px;
  align-items:center;
}

.extend p {
  font-size:14px;
  color:var(--gray);
}

.faq {
  border-top:1px solid var(--line);
  margin-top:35px;
}

.faq details {
  border-bottom:1px solid var(--line);
}

.faq summary {
  font-weight:bold;
}

.faq details p {
  padding:0 0 25px;
  max-width:900px;
  color:var(--gray);
}

.end {
  padding:55px 0;
  background:var(--paper);
}

.end .wrap {
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.end h2 {
  font-size:28px;
}

footer {
  padding:28px 5%;
  font-size:12px;
  color:var(--muted);
  display:flex;
  justify-content:space-between;
}

.hidden {
  display:none;
}

.top {
  border-bottom:1px solid var(--ink);
}

a:focus-visible,button:focus-visible,summary:focus-visible {
  outline:2px solid var(--red);
  outline-offset:5px;
}

@media(max-width:760px) {
  header {
    height:76px;
  }
  header img {
    width:145px;
  }
  nav {
    gap:14px;
    font-size:12px;
  }
  nav a:nth-child(n+3) {
    display:none;
  }
  .hero {
    padding-top:45px;
  }
  .hero-grid,.section-head,.resources {
    grid-template-columns:1fr;
    gap:28px;
  }
  .hero h1 {
    transform:none;
    letter-spacing:-2px;
  }
  .hero p {
    font-size:15px;
  }
  .schematic {
    height:270px;
  }
  .stats {
    margin-top:35px;
    grid-template-columns:repeat(2,1fr);
    gap:30px;
  }
  .stat:nth-child(3) {
    padding:0;
    border:0;
  }
  .stat b {
    font-size:30px;
  }
  section {
    padding:60px 0;
  }
  h2 {
    font-size:28px;
  }
  .outcomes,.courses {
    grid-template-columns:1fr;
  }
  .outcome {
    border-bottom:1px solid var(--line);
    padding:22px 0;
  }
  .resource-grid {
    grid-template-columns:repeat(2,1fr);
  }
  .project {
    grid-template-columns:32px 1fr;
    gap:15px;
  }
  .project p {
    grid-column:2;
  }
  .steps {
    grid-template-columns:1fr 1fr;
  }
  .extend {
    display:block;
  }
  .end .wrap {
    display:block;
  }
  footer {
    display:block;
  }
  .secondary {
    margin-left:8px;
  }
  .btn {
    padding:10px 18px;
    gap:16px;
  }
  .tabs {
    gap:25px;
  }
}

@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior:auto;
  }
}

.inline-style-1 {
  color:#b9baba;
  margin-top:25px;
}

.inline-style-2 {
  padding-top:0;
}
/* 首屏右侧实训室图片 */
.schematic.hero-photo {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.schematic.hero-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
/* 加载思源黑体 Bold */
@font-face {
  font-family: "StatFont";
  src: url("fonts/SourceHanSansSC-Bold.otf") format("opentype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* 只修改 06、09、三电、课·训·评 */
.stat b {
  font-family: "StatFont", sans-serif;
  font-size: 38px;
  font-weight: 700;
  line-height: 1.2;
}
/* 三个能力介绍上方的配图 */
.outcome-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center;
  margin-bottom: 24px;
}

@media (max-width: 800px) {
  .outcome-img {
    margin-bottom: 18px;
  }
}
/* 教学资源介绍下方：三张图片横排 */
.resource-photos {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.resource-photos img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;

  object-position: center;
}

/* 手机端缩小图片间距 */
@media (max-width: 600px) {
  .resource-photos {
    gap: 8px;
    margin-top: 20px;
  }
}