:root {
  --paper: #F7F4E9;
  --blue: #2545D9;
  --ink: #151B31;
  --lemon: #E7EE71;
  --coral: #F57962;
  --lilac: #C8BEF0;
  --rule: rgba(21, 27, 49, .24);
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scrollbar-color: var(--blue) var(--paper); }
body { margin: 0; }
::selection { background: var(--lemon); color: var(--ink); }
img { max-width: 100%; display: block; }
a { color: inherit; }
a:focus-visible { outline: 3px solid var(--coral); outline-offset: 5px; }
h1,h2,h3,p { margin-top: 0; }
h1,h2,h3 { font-weight: 900; letter-spacing: -.035em; }
svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.shell { width: min(100% - 64px, 1240px); margin-inline: auto; }
.skip-link { position: absolute; top: -70px; left: 16px; z-index: 50; padding: 12px 16px; background: var(--lemon); color: var(--ink); font-weight: 800; }
.skip-link:focus { top: 12px; }

.site-header { background: var(--blue); color: #fff; border-bottom: 1px solid rgba(255,255,255,.34); }
.header-inner { min-height: 78px; display: flex; align-items: center; gap: 36px; }
.brand { display: inline-flex; align-items: baseline; gap: 12px; text-decoration: none; white-space: nowrap; }
.brand span { font-size: 24px; font-weight: 900; letter-spacing: -.03em; }
.brand small { font-size: 12px; font-weight: 700; color: #E4E8FF; }
.top-nav { display: flex; gap: 27px; margin-left: auto; }
.top-nav a { text-decoration: none; font-size: 14px; font-weight: 700; text-underline-offset: 6px; }
.top-nav a:hover { text-decoration: underline; }
.header-cta { display: inline-flex; align-items: center; gap: 10px; min-height: 40px; padding: 9px 14px; text-decoration: none; background: #fff; color: var(--blue); font-size: 13px; font-weight: 900; }
.header-cta:hover { background: var(--lemon); }
.header-cta svg { width: 16px; height: 16px; }

.hero { background: var(--blue); color: #fff; }
.hero-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .96fr); gap: clamp(48px, 6vw, 90px); align-items: center; padding-top: 76px; padding-bottom: 95px; }
.hero-copy { min-width: 0; }
.hero h1 { max-width: 650px; margin: 0 0 29px; font-size: clamp(60px, 6.35vw, 94px); line-height: 1.16; }
.hero h1 span { color: var(--lemon); }
.hero-copy > p:not(.hero-disclosure) { max-width: 525px; margin-bottom: 31px; color: #E9ECFF; font-size: 18px; line-height: 1.8; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 34px; min-height: 62px; padding: 17px 22px; text-decoration: none; font-size: 15px; font-weight: 900; line-height: 1.35; transition: background-color .18s ease, color .18s ease; }
.button svg { width: 20px; height: 20px; }
.button-lemon { background: var(--lemon); color: var(--ink); }
.button-lemon:hover { background: #fff; }
.hero-scroll { font-size: 14px; font-weight: 800; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.7); padding: 8px 0; }
.hero-scroll:hover { color: var(--lemon); border-color: var(--lemon); }
.hero-scroll span { margin-left: 6px; }
.hero-disclosure { margin: 32px 0 0; color: #C7D0FF; font-size: 12px; line-height: 1.6; }
.hero-cover { display: block; justify-self: end; width: min(100%, 555px); box-shadow: 0 20px 42px rgba(4, 12, 69, .26); }
.hero-cover img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; }
.hero-cover:hover img { filter: saturate(1.13); }

.editorial-intro { background: var(--paper); padding: 107px 0 86px; }
.intro-inner { display: grid; grid-template-columns: 1fr minmax(0, .82fr); align-items: end; gap: 80px; }
.editorial-intro h2 { max-width: 590px; margin: 0; color: var(--blue); font-size: clamp(53px, 5vw, 74px); line-height: 1.18; }
.intro-aside { padding-bottom: 4px; }
.intro-aside p { max-width: 540px; font-size: 17px; line-height: 1.8; }
.intro-aside p a { font-weight: 900; color: var(--blue); text-decoration-thickness: 2px; text-underline-offset: 5px; }
.intro-aside nav { display: flex; flex-wrap: wrap; gap: 11px; }
.intro-aside nav a { padding: 8px 13px; color: var(--blue); border: 1px solid var(--blue); font-size: 13px; font-weight: 800; text-decoration: none; }
.intro-aside nav a:hover { background: var(--blue); color: #fff; }

.chapter { scroll-margin-top: 24px; padding: 91px 0; }
.chapter-feeling { background: var(--paper); border-top: 1px solid var(--rule); }
.chapter-connection { background: #E7EBFF; }
.chapter-solitude { background: #EEEAF8; }
.chapter-inner { display: grid; grid-template-columns: minmax(0, .93fr) minmax(0, 1fr); gap: clamp(66px, 8vw, 120px); align-items: center; }
.chapter-poster { display: block; width: min(100%, 545px); text-decoration: none; box-shadow: 0 19px 34px rgba(21,27,49,.16); }
.chapter-poster img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; }
.chapter-poster:hover img { filter: saturate(1.14); }
.chapter-copy { min-width: 0; }
.chapter-copy h3 { margin: 0 0 13px; font-size: clamp(44px, 4.3vw, 64px); line-height: 1.22; }
.chapter-lead { margin: 0 0 31px; font-size: 17px; line-height: 1.65; }
.topic-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--rule); }
.topic-list li { border-bottom: 1px solid var(--rule); }
.topic-list a { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 103px; padding: 18px 0; text-decoration: none; }
.topic-list a:hover { color: var(--blue); }
.topic-list a span { display: flex; flex-direction: column; gap: 6px; }
.topic-list strong { font-size: 22px; font-weight: 900; line-height: 1.35; }
.topic-list small { font-size: 13px; line-height: 1.6; color: #454B60; }
.topic-list svg { width: 22px; height: 22px; }
.chapter-connection .chapter-poster { grid-column: 2; grid-row: 1; justify-self: end; }
.chapter-connection .chapter-copy { grid-column: 1; grid-row: 1; }

.outro { background: var(--lemon); padding: 104px 0 115px; }
.outro-inner { display: flex; align-items: end; justify-content: space-between; gap: 80px; }
.outro h2 { margin: 0 0 20px; max-width: 710px; font-size: clamp(53px, 5.25vw, 78px); line-height: 1.18; }
.outro p { max-width: 650px; margin: 0; font-size: 16px; line-height: 1.8; }
.button-blue { min-width: min(290px, 100%); background: var(--blue); color: #fff; white-space: nowrap; }
.button-blue:hover { background: var(--ink); }
.site-footer { background: var(--ink); color: #fff; padding: 25px 0; }
.footer-inner { display: flex; align-items: center; gap: 28px; font-size: 12px; }
.footer-inner span:first-child { font-size: 14px; font-weight: 900; }
.footer-inner span:nth-child(2) { color: #C9CEE2; }
.footer-inner a { margin-left: auto; text-decoration: none; }
.footer-inner a:hover { color: var(--lemon); }

@media (max-width: 1000px) {
  .shell { width: min(100% - 48px, 880px); }
  .hero-inner { gap: 35px; padding-top: 70px; padding-bottom: 80px; }
  .hero h1 { font-size: clamp(50px, 5.6vw, 68px); }
  .hero-copy > p:not(.hero-disclosure) { font-size: 16px; }
  .chapter-inner { gap: 50px; }
  .chapter-copy h3 { font-size: 46px; }
  .topic-list a { min-height: 88px; }
  .topic-list strong { font-size: 19px; }
  .topic-list small { font-size: 12px; }
  .outro-inner { gap: 40px; }
}
@media (max-width: 760px) {
  .shell { width: min(100% - 40px, 610px); }
  .header-inner { min-height: 70px; }
  .top-nav { display: none; }
  .header-cta { margin-left: auto; }
  .hero-inner { display: flex; flex-direction: column; align-items: stretch; gap: 39px; padding-top: 52px; padding-bottom: 67px; }
  .hero h1 { font-size: clamp(49px, 8.4vw, 65px); }
  .hero-copy > p:not(.hero-disclosure) { max-width: 600px; }
  .hero-cover { width: min(100%, 560px); justify-self: auto; align-self: center; }
  .editorial-intro { padding: 74px 0 64px; }
  .intro-inner { display: block; }
  .editorial-intro h2 { margin-bottom: 20px; font-size: clamp(43px, 7.6vw, 63px); }
  .intro-aside p { font-size: 15px; }
  .chapter { padding: 67px 0 76px; }
  .chapter-inner { display: flex; flex-direction: column; align-items: stretch; gap: 34px; }
  .chapter-poster, .chapter-connection .chapter-poster { order: 1; width: min(100%, 560px); align-self: center; }
  .chapter-copy, .chapter-connection .chapter-copy { order: 2; }
  .chapter-copy h3 { font-size: clamp(42px, 7vw, 56px); }
  .topic-list a { min-height: 92px; }
  .outro { padding: 73px 0 79px; }
  .outro-inner { display: block; }
  .outro h2 { font-size: clamp(47px, 7.5vw, 64px); }
  .outro p { margin-bottom: 27px; }
}
@media (max-width: 500px) {
  .shell { width: min(100% - 32px, 420px); }
  .brand { display: block; line-height: 1.17; }
  .brand span { font-size: 19px; }
  .brand small { display: block; font-size: 10px; margin-top: 3px; }
  .header-cta { min-height: 36px; padding: 7px 10px; font-size: 12px; }
  .hero-inner { padding-top: 43px; gap: 31px; }
  .hero h1 { font-size: clamp(45px, 12vw, 57px); margin-bottom: 23px; }
  .hero-copy > p:not(.hero-disclosure) { font-size: 15px; line-height: 1.75; margin-bottom: 23px; }
  .hero-actions { gap: 18px; }
  .button { width: 100%; min-height: 57px; padding: 14px 18px; font-size: 14px; }
  .hero-scroll { font-size: 13px; }
  .hero-disclosure { margin-top: 24px; font-size: 11px; }
  .editorial-intro { padding: 66px 0 60px; }
  .editorial-intro h2 { font-size: 43px; }
  .intro-aside nav { gap: 8px; }
  .intro-aside nav a { padding: 8px 9px; font-size: 11px; }
  .chapter { padding: 57px 0 66px; }
  .chapter-inner { gap: 29px; }
  .chapter-copy h3 { font-size: 41px; }
  .chapter-lead { font-size: 15px; margin-bottom: 23px; }
  .topic-list a { min-height: 84px; padding: 13px 0; }
  .topic-list strong { font-size: 19px; }
  .topic-list small { font-size: 12px; }
  .outro { padding: 68px 0 73px; }
  .outro h2 { font-size: 45px; }
  .outro p { font-size: 14px; }
  .footer-inner { display: grid; gap: 7px; }
  .footer-inner a { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}