:root {
  --home-green: #0d493a;
  --home-green-deep: #08392e;
  --home-green-soft: #edf5f1;
  --home-amber: #d4a72c;
  --home-ink: #17231f;
  --home-muted: #64716b;
  --home-line: #d9e2dd;
  --home-bg: #f3f6f4;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; min-width: 0; overflow-x: hidden; color: var(--home-ink); background: #fff; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif; }
a { color: inherit; }
button, a { letter-spacing: 0; }
.official-container { width: min(1200px, calc(100% - 48px)); margin-inline: auto; }

.official-header { position: sticky; top: 0; z-index: 100; height: 68px; color: #fff; background: var(--home-green-deep); box-shadow: 0 2px 12px rgba(10, 31, 24, .16); }
.official-header-inner { width: min(1440px, calc(100% - 36px)); height: 100%; margin-inline: auto; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px; }
.official-brand { display: inline-flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; white-space: nowrap; }
.official-brand img { width: 36px; height: 36px; display: block; }
.official-brand span { display: flex; align-items: baseline; gap: 9px; }
.official-brand strong { font-family: "Noto Serif SC", "Songti SC", serif; font-size: 24px; }
.official-brand small { color: rgba(255, 255, 255, .7); font-size: 11px; font-weight: 650; }
.official-actions { grid-column: 3; justify-self: end; }
.official-actions a { min-height: 38px; display: inline-flex; align-items: center; justify-content: center; padding: 0 14px; border: 1px solid rgba(255, 255, 255, .34); color: #fff; text-decoration: none; font-size: 12px; font-weight: 800; white-space: nowrap; }
.official-actions a:hover, .official-actions a:focus-visible { border-color: #ffe28a; color: #ffe28a; outline: none; }

.official-hero { position: relative; height: calc(100svh - 136px); min-height: 520px; max-height: 680px; overflow: hidden; color: #fff; background-color: #174f42; background-image: url("./悟净学术-官网图书馆高清背景-v2.jpg?v=20260717-library1"); background-position: center 48%; background-size: cover; background-repeat: no-repeat; }
.official-hero-overlay { position: absolute; inset: 0; background: rgba(5, 42, 34, .58); }
.official-hero-content { position: relative; height: 100%; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding-block: 28px; }
.official-eyebrow, .official-section-heading > span, .official-final-copy > span { color: #f1cb5f; font-size: 12px; font-weight: 850; }
.official-hero h1 { margin: 12px 0 10px; font-family: "Noto Serif SC", "Songti SC", serif; font-size: 54px; line-height: 1.08; letter-spacing: 0; }
.official-hero-offer { display: block; max-width: 780px; margin-bottom: 8px; color: #fff; font-size: 24px; line-height: 1.45; }
.official-hero-content > p { max-width: 740px; margin: 0; color: rgba(255, 255, 255, .84); font-size: 16px; line-height: 1.8; }
.official-hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 25px; }
.official-primary, .official-secondary { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 0 18px; border: 1px solid transparent; text-decoration: none; font-size: 13px; font-weight: 850; }
.official-primary { color: #18372e; border-color: #ffe28a; background: #ffe28a; }
.official-primary:hover, .official-primary:focus-visible { border-color: #ffda63; background: #ffda63; outline: none; }
.official-secondary { color: #fff; border-color: rgba(255, 255, 255, .56); background: rgba(3, 28, 21, .24); }
.official-secondary:hover, .official-secondary:focus-visible { border-color: #fff; outline: none; }
.official-hero-points { width: min(760px, 100%); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 34px 0 0; padding: 18px 0 0; border-top: 1px solid rgba(255, 255, 255, .3); list-style: none; }
.official-hero-points li { padding-right: 22px; }
.official-hero-points strong, .official-hero-points span { display: block; }
.official-hero-points strong { color: #fff; font-size: 13px; }
.official-hero-points span { margin-top: 6px; color: rgba(255, 255, 255, .7); font-size: 11px; line-height: 1.55; }

.official-section { padding: 72px 0; }
.official-section.is-soft { background: var(--home-bg); }
.official-section-heading { max-width: 760px; margin-bottom: 28px; }
.official-section-heading > span { color: var(--home-green); }
.official-section-heading h2 { margin: 8px 0 0; font-size: 30px; line-height: 1.35; letter-spacing: 0; }
.official-section-heading p { margin: 10px 0 0; color: var(--home-muted); font-size: 14px; line-height: 1.75; }

.official-audience-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--home-line); border-left: 1px solid var(--home-line); }
.official-audience-card { min-height: 250px; display: flex; flex-direction: column; padding: 26px; border-right: 1px solid var(--home-line); border-bottom: 1px solid var(--home-line); background: #fff; }
.official-audience-card > span { color: var(--home-green); font-size: 11px; font-weight: 850; }
.official-audience-card h3 { margin: 17px 0 9px; font-size: 20px; }
.official-audience-card p { margin: 0; color: var(--home-muted); font-size: 12px; line-height: 1.75; }
.official-audience-card strong { display: block; margin-top: 15px; color: #40524b; font-size: 11px; line-height: 1.65; }
.official-audience-card a { display: inline-flex; align-items: center; gap: 8px; margin-top: auto; padding-top: 18px; color: var(--home-green); text-decoration: none; font-size: 12px; font-weight: 850; }

.official-problem-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--home-line); border-left: 1px solid var(--home-line); }
.official-problem-card { min-height: 285px; display: flex; flex-direction: column; padding: 23px; border-right: 1px solid var(--home-line); border-bottom: 1px solid var(--home-line); background: #fff; }
.official-problem-card > span { color: var(--home-green); font-size: 10px; font-weight: 900; }
.official-problem-card h3 { margin: 15px 0 14px; font-size: 17px; line-height: 1.45; }
.official-problem-card dl { display: grid; gap: 10px; margin: 0; }
.official-problem-card dl div { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 8px; }
.official-problem-card dt { color: #78847f; font-size: 10px; font-weight: 800; }
.official-problem-card dd { margin: 0; color: var(--home-muted); font-size: 11px; line-height: 1.65; }
.official-problem-card a { display: inline-flex; align-items: center; gap: 7px; margin-top: auto; padding-top: 16px; color: var(--home-green); text-decoration: none; font-size: 11px; font-weight: 850; }

.official-process { position: relative; padding: 70px 0; overflow: hidden; color: #fff; background-color: var(--home-green-deep); background-image: url("./悟净学术-流程研究场景-横版.jpg?v=20260717-process2"); background-position: center 52%; background-size: cover; background-repeat: no-repeat; }
.official-process::before { content: ""; position: absolute; inset: 0; background: rgba(4, 42, 33, .83); pointer-events: none; }
.official-process .official-container { position: relative; z-index: 1; }
.official-process .official-section-heading > span { color: #f1cb5f; }
.official-process .official-section-heading h2 { color: #fff; }
.official-process .official-section-heading p { color: rgba(255, 255, 255, .68); }
.official-process ol { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 0; padding: 0; border-top: 1px solid rgba(255, 255, 255, .24); list-style: none; }
.official-process li { min-height: 168px; padding: 22px 20px; border-right: 1px solid rgba(255, 255, 255, .16); }
.official-process li:last-child { border-right: 0; }
.official-process li > span { color: #f1cb5f; font-size: 10px; font-weight: 900; }
.official-process li strong { display: block; margin-top: 24px; font-size: 15px; }
.official-process li p { margin: 8px 0 0; color: rgba(255, 255, 255, .7); font-size: 11px; line-height: 1.7; }

.official-outcome-layout { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(320px, .65fr); gap: 34px; align-items: start; }
.official-product-preview { margin: 0; }
.official-product-preview img { width: 100%; height: auto; display: block; border: 1px solid #cbd7d1; object-fit: contain; }
.official-product-preview figcaption { display: flex; align-items: baseline; gap: 14px; margin-top: 10px; }
.official-product-preview figcaption strong { font-size: 12px; }
.official-product-preview figcaption span { color: var(--home-muted); font-size: 10px; }
.official-outcome-list { border-top: 1px solid var(--home-line); }
.official-outcome-list article { min-height: 116px; padding: 18px 4px; border-bottom: 1px solid var(--home-line); }
.official-outcome-list span { color: var(--home-green); font-size: 10px; font-weight: 900; }
.official-outcome-list h3 { margin: 7px 0 6px; font-size: 16px; }
.official-outcome-list p { margin: 0; color: var(--home-muted); font-size: 11px; line-height: 1.65; }
.official-outcome-note { display: block; margin-top: 14px; color: #7b6750; font-size: 10px; line-height: 1.65; }

.official-trust-layout { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 54px; align-items: start; }
.official-trust-points { border-top: 1px solid var(--home-line); }
.official-trust-points article { padding: 18px 2px; border-bottom: 1px solid var(--home-line); }
.official-trust-points strong { display: block; color: var(--home-green); font-size: 13px; }
.official-trust-points p { margin: 7px 0 0; color: var(--home-muted); font-size: 11px; line-height: 1.7; }
.official-question-list { border-top: 1px solid var(--home-line); }
.official-question-list details { border-bottom: 1px solid var(--home-line); background: #fff; }
.official-question-list summary { min-height: 58px; display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 0 14px; color: #26332e; font-size: 12px; font-weight: 800; cursor: pointer; list-style: none; }
.official-question-list summary::-webkit-details-marker { display: none; }
.official-question-list summary::after { content: "+"; width: 22px; height: 22px; display: inline-flex; align-items: center; justify-content: center; flex: 0 0 22px; border: 1px solid #cbd7d1; color: var(--home-green); font-size: 15px; }
.official-question-list details[open] summary::after { content: "-"; }
.official-question-list details p { margin: 0; padding: 0 44px 16px 14px; color: var(--home-muted); font-size: 11px; line-height: 1.75; }
.official-policy-links { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 18px; }
.official-policy-links a { color: var(--home-green); font-size: 11px; font-weight: 750; }
.official-final-cta { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 32px; align-items: center; margin-top: 42px; padding: 32px; color: #fff; background: #153f34; }
.official-final-copy h2 { margin: 7px 0 0; font-size: 25px; }
.official-final-copy p { margin: 8px 0 0; color: rgba(255, 255, 255, .7); font-size: 11px; line-height: 1.7; }
.official-contact-actions { min-width: 310px; display: grid; gap: 8px; }
.official-contact-actions button { min-height: 40px; border: 1px solid rgba(255, 255, 255, .42); color: #fff; background: transparent; padding: 0 14px; font-size: 11px; font-weight: 800; cursor: pointer; }
.official-contact-actions button:hover, .official-contact-actions button:focus-visible { border-color: #ffe28a; color: #ffe28a; outline: none; }
.official-contact-actions > span { min-height: 14px; color: #ffe28a; font-size: 9px; text-align: center; }

.official-footer { padding: 30px 0; color: rgba(255, 255, 255, .8); background: #082d25; }
.official-footer .official-container { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 28px; }
.official-brand.is-footer strong { font-size: 18px; }
.official-footer p { max-width: 480px; margin: 0; color: rgba(255, 255, 255, .58); font-size: 10px; line-height: 1.65; }
.official-footer nav { display: flex; flex-wrap: wrap; gap: 14px; }
.official-footer nav a { color: rgba(255, 255, 255, .72); font-size: 10px; text-decoration: none; }

@media (max-width: 900px) {
  .official-audience-grid { grid-template-columns: 1fr; }
  .official-audience-card { min-height: 0; }
  .official-problem-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .official-process ol { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .official-process li:nth-child(2) { border-right: 0; }
  .official-process li:nth-child(-n+2) { border-bottom: 1px solid rgba(255, 255, 255, .16); }
  .official-outcome-layout, .official-trust-layout { grid-template-columns: 1fr; }
  .official-outcome-layout { gap: 24px; }
  .official-trust-layout { gap: 34px; }
  .official-final-cta { grid-template-columns: 1fr; }
  .official-contact-actions { min-width: 0; }
}

@media (max-width: 640px) {
  .official-container { width: calc(100% - 28px); }
  .official-header { height: 64px; }
  .official-header-inner { width: calc(100% - 24px); grid-template-columns: 1fr auto; }
  .official-brand small { display: none; }
  .official-brand strong { font-size: 21px; }
  .official-actions { grid-column: 2; }
  .official-actions a { min-height: 36px; padding-inline: 10px; font-size: 11px; }
  .official-hero { height: calc(100svh - 118px); min-height: 520px; background-position: 45% center; }
  .official-hero-content { padding-block: 22px; }
  .official-eyebrow { font-size: 10px; }
  .official-hero h1 { margin-top: 9px; font-size: 38px; }
  .official-hero-offer { font-size: 19px; }
  .official-hero-content > p { font-size: 14px; line-height: 1.7; }
  .official-hero-actions { width: 100%; margin-top: 20px; }
  .official-hero-actions a { flex: 1; padding-inline: 9px; }
  .official-hero-points { grid-template-columns: 1fr; gap: 8px; margin-top: 20px; padding-top: 14px; }
  .official-hero-points li { padding-right: 0; }
  .official-hero-points span { display: none; }
  .official-section { padding: 54px 0; }
  .official-section-heading h2 { font-size: 25px; }
  .official-problem-grid { grid-template-columns: 1fr; }
  .official-problem-card { min-height: 0; }
  .official-process { padding: 54px 0; }
  .official-process ol { grid-template-columns: 1fr; }
  .official-process li, .official-process li:nth-child(2) { min-height: 118px; border-right: 0; border-bottom: 1px solid rgba(255, 255, 255, .16); }
  .official-process li:last-child { border-bottom: 0; }
  .official-process li strong { margin-top: 13px; }
  .official-product-preview figcaption { display: block; }
  .official-product-preview figcaption span { display: block; margin-top: 5px; }
  .official-final-cta { margin-inline: -14px; padding: 26px 18px; }
  .official-contact-actions .official-primary { width: 100%; }
  .official-policy-links { display: grid; gap: 10px; }
  .official-footer .official-container { grid-template-columns: 1fr; }
}

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