@import url('https://fonts.googleapis.com/css2?family=Kalam:wght@400;700&family=Patrick+Hand&display=swap');

:root {
  --ink: #26171a;
  --pink: #eb879c;
  --rose: #ffb6c1;
  --cream: #fff6f7;
  --paper: #fffdfd;
  --soft: #f8e7ea;
  --muted: #5b4247;
  --radius: 28px;
  --shadow: 0 2px 4px rgba(38, 23, 26, .05), 0 16px 34px -16px rgba(235, 135, 156, .5);
  --shadow-tight: 0 2px 4px rgba(38, 23, 26, .06), 0 8px 20px -12px rgba(235, 135, 156, .55);
  --wrap: 1140px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--cream);
  color: var(--ink);
  font-family: 'Patrick Hand', ui-rounded, system-ui, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.72;
}

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

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

h1, h2, h3 {
  margin: 0 0 .5em;
  font-family: 'Kalam', 'Patrick Hand', ui-rounded, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 700;
  line-height: 1.26;
  letter-spacing: .01em;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
  border-radius: 14px;
}

.skip {
  position: absolute;
  left: .6rem;
  top: -4rem;
  z-index: 90;
  padding: .55rem 1.1rem;
  border-radius: 14px;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  transition: top .2s ease-out;
}

.skip:focus { top: .6rem; }

/* 顶栏 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: .55rem clamp(.7rem, 2.5vw, 1.4rem);
  background: rgba(255, 246, 247, .93);
  border-bottom: 1px solid var(--soft);
  backdrop-filter: blur(9px);
}

.brand {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 16px;
  background: linear-gradient(150deg, var(--rose), var(--pink));
  box-shadow: var(--shadow-tight);
  color: var(--ink);
  font-family: 'Kalam', 'Patrick Hand', sans-serif;
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
}

.brand img { width: 26px; height: 26px; object-fit: contain; }

.tabs {
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar { display: none; }

.tabs ol {
  display: flex;
  gap: .1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tabs a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 .62rem;
  border-radius: 999px;
  font-size: 16px;
  text-decoration: none;
  white-space: nowrap;
  transition: background .22s ease, color .22s ease;
}

.tabs a:hover { background: var(--soft); }

.cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 1rem;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 16px;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: var(--shadow-tight);
  transition: transform .22s ease;
}

.cta:hover { transform: translateY(-1px); }

/* 首屏 */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: clamp(1.2rem, 4vw, 2.6rem);
  min-height: 100svh;
  padding: clamp(1.4rem, 6vh, 3.4rem) clamp(1rem, 5vw, 3.4rem) clamp(4rem, 12vh, 6.5rem);
  overflow: hidden;
}

.hero-copy { position: relative; z-index: 2; max-width: 34rem; }

.kicker {
  margin: 0 0 .5rem;
  font-size: 16px;
  letter-spacing: .16em;
  color: var(--muted);
}

.hero h1 {
  font-size: clamp(2rem, 5.6vw, 3.3rem);
  margin: 0 0 .45rem;
}

.hero-desc {
  max-width: 30rem;
  margin: 0 0 1.4rem;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 1.25rem;
  border-radius: 999px;
  font-size: 17px;
  text-decoration: none;
  transition: transform .22s ease, background .22s ease;
}

.btn-ink { background: var(--ink); color: #fff; box-shadow: var(--shadow); }
.btn-line { border: 2px solid var(--ink); }
.btn:hover { transform: translateY(-2px); }

.hero-art { position: relative; z-index: 2; }

.hero-art img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--soft);
  box-shadow: var(--shadow);
  transform: rotate(-1.1deg);
}

.slash {
  position: absolute;
  left: -8%;
  right: -8%;
  bottom: -2.4rem;
  z-index: 1;
  height: 5rem;
  background: linear-gradient(100deg, var(--rose), var(--pink));
  transform: skewY(-3.4deg);
}

/* 主体双栏 */
.wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 19rem;
  gap: clamp(1.1rem, 3vw, 2.2rem);
  align-items: start;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(1.4rem, 4vw, 2.4rem) clamp(1rem, 4vw, 2rem) 2.6rem;
}

.lede { min-width: 0; }

.prose > section {
  margin: 0 0 1.5rem;
  padding: clamp(1.1rem, 3vw, 2.1rem);
  border: 1px solid #fbeaee;
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
  scroll-margin-top: 5.6rem;
}

.prose > section:nth-of-type(even) { background: #fff9fa; }
.prose > section:last-child { margin-bottom: 0; }

.prose h2 { font-size: clamp(1.4rem, 3.4vw, 1.95rem); }
.prose h3 { font-size: 1.16rem; }

.prose p { margin: 0 0 1em; }
.prose p:last-child { margin-bottom: 0; }

.prose ul,
.prose ol { margin: 0 0 1em; padding-left: 1.3em; }
.prose li { margin: .25em 0; }

.prose a { text-decoration: underline; text-decoration-color: var(--pink); text-underline-offset: 3px; }

.prose blockquote {
  margin: 0 0 1em;
  padding: .7em 1em;
  border-left: 4px solid var(--rose);
  border-radius: 0 18px 18px 0;
  background: var(--soft);
}

.prose time {
  display: inline-block;
  padding: .1em .6em;
  border-radius: 999px;
  background: var(--soft);
  font-size: 16px;
  color: var(--muted);
}

.prose code {
  padding: .1em .4em;
  border-radius: 8px;
  background: var(--soft);
  font-size: 16px;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1em;
  font-size: 16px;
}

.prose th,
.prose td {
  padding: .5em .6em;
  border-bottom: 1px solid var(--soft);
  text-align: left;
}

/* 右侧 */
.side {
  position: sticky;
  top: 5.4rem;
  padding: 1.2rem 1.1rem;
  border: 1px solid #fbeaee;
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.side h2 { margin: 0; font-size: 1.2rem; }

.subtitle {
  margin: .25rem 0 1rem;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
}

.side-list {
  display: grid;
  gap: .12rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.side-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 .65rem;
  border-radius: 14px;
  font-size: 16px;
  text-decoration: none;
  transition: background .22s ease;
}

.side-list a:hover { background: var(--soft); }

/* 页脚 */
footer {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 1.5rem clamp(1rem, 4vw, 2rem) 3rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .8rem;
  border-top: 2px dashed var(--rose);
}

.subscribe {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: 0;
}

.subscribe label { font-size: 16px; }

.subscribe input {
  width: 11rem;
  min-width: 0;
  min-height: 44px;
  padding: 0 .9rem;
  border: 2px solid var(--soft);
  border-radius: 999px;
  background: #fff;
  font: inherit;
  font-size: 16px;
  color: var(--ink);
}

.subscribe button {
  min-height: 44px;
  padding: 0 1.15rem;
  border: 0;
  border-radius: 999px;
  background: var(--pink);
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .22s ease;
}

.subscribe button:hover { transform: translateY(-2px); }

footer small { font-size: 16px; color: var(--muted); }

/* 入场 */
html.js .reveal { opacity: 0; transform: translateY(18px); }

html.js .reveal.in {
  opacity: 1;
  transform: translateY(0);
  transition: opacity .3s ease-out, transform .3s cubic-bezier(.22, .9, .3, 1);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover,
  .cta:hover,
  .subscribe button:hover { transform: none; }
}

/* 窄屏 */
@media (max-width: 900px) {
  .wrap { grid-template-columns: minmax(0, 1fr); }
  .side { position: static; }
}

@media (max-width: 780px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    min-height: auto;
    padding-top: 1.1rem;
    padding-bottom: 3.6rem;
  }

  .hero-art { order: 2; }
  .hero-art img { aspect-ratio: 16 / 10; transform: none; }
  .slash { bottom: -2.9rem; height: 3.4rem; }
  .tabs a { padding: 0 .5rem; }
  .cta { padding: 0 .8rem; }
}

@media (max-width: 420px) {
  .tabs a { font-size: 15px; }
  .subscribe { width: 100%; }
  .subscribe input { flex: 1 1 8rem; width: auto; }
}

button[aria-expanded]{min-width:44px;min-height:44px}