:root {
  color-scheme: light;
  --ink: #132019;
  --muted: #5d6b62;
  --green: #166534;
  --green-deep: #0c4423;
  --green-soft: #edf8f0;
  --lime: #c9f47a;
  --cream: #fbfaf5;
  --line: #dce5de;
  --white: #fff;
  --shadow: 0 22px 55px rgba(17, 54, 31, .12);
  --radius: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:focus-visible, summary:focus-visible { outline: 3px solid #f5a524; outline-offset: 3px; }
.shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -70px; z-index: 100; padding: 10px 16px; border-radius: 8px; background: #fff; color: var(--green); box-shadow: var(--shadow); }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 229, 222, .88);
  background: rgba(251, 250, 245, .92);
  backdrop-filter: blur(18px);
}
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 36px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 13px; color: #fff; background: var(--green); font-size: 19px; font-weight: 900; box-shadow: 0 9px 20px rgba(22, 101, 52, .2); }
.brand > span:last-child { display: flex; flex-direction: column; line-height: 1.2; }
.brand strong { font-size: 18px; letter-spacing: .03em; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 10px; letter-spacing: .04em; }
.main-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.main-nav a { position: relative; color: #3e4b42; font-size: 15px; font-weight: 650; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--green); }
.main-nav a[aria-current="page"]::after { content: ""; position: absolute; left: 2px; right: 2px; bottom: -9px; height: 2px; border-radius: 3px; background: var(--green); }
.header-actions { display: flex; align-items: center; gap: 16px; }
.login-link { color: var(--green-deep); font-size: 14px; font-weight: 700; }

.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; padding: 0 24px; border: 1px solid var(--green); border-radius: 13px; color: #fff; background: var(--green); box-shadow: 0 10px 24px rgba(22, 101, 52, .17); font-size: 15px; font-weight: 800; line-height: 1.2; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); background: var(--green-deep); }
.button.small { min-height: 42px; padding-inline: 18px; border-radius: 11px; font-size: 14px; }
.button.secondary { color: var(--green); background: transparent; box-shadow: none; }
.button.secondary:hover { background: var(--green-soft); }
.button.light { border-color: #fff; color: var(--green-deep); background: #fff; box-shadow: none; }

.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background: radial-gradient(circle at 85% 15%, rgba(201, 244, 122, .45), transparent 28%), linear-gradient(150deg, #f7fbf4 0%, #fbfaf5 64%); }
.hero::before { content: ""; position: absolute; width: 520px; height: 520px; left: -340px; top: -270px; border: 100px solid rgba(22, 101, 52, .035); border-radius: 50%; }
.hero-grid { position: relative; z-index: 1; min-height: 440px; display: grid; grid-template-columns: minmax(0, .95fr) minmax(420px, 1.05fr); align-items: center; gap: 76px; padding-block: 92px; }
.home-hero .hero-grid { min-height: 660px; }
.eyebrow, .kicker { margin: 0 0 15px; color: var(--green); font-size: 13px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.hero h1 { max-width: 730px; margin: 0; font-size: clamp(40px, 5vw, 68px); line-height: 1.12; letter-spacing: -.045em; }
.home-hero h1 { font-size: clamp(42px, 5.4vw, 72px); }
.lead { max-width: 720px; margin: 24px 0 0; color: #4b5d52; font-size: clamp(17px, 2vw, 20px); line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 32px; }
.micro-copy { margin: 15px 0 0; color: #718077; font-size: 13px; }
.hero-watermark { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 13px; min-height: 210px; padding: 40px; border: 1px solid rgba(22, 101, 52, .12); border-radius: 32px; background: rgba(255, 255, 255, .65); box-shadow: var(--shadow); transform: rotate(1deg); }
.hero-watermark span { padding: 10px 16px; border-radius: 10px; background: var(--green-soft); color: var(--green-deep); font-weight: 750; }
.hero-watermark i { color: #8fa196; font-style: normal; }
.hero-watermark b { flex-basis: 100%; text-align: center; color: var(--green); font-size: 26px; }

.writer-demo { border: 1px solid rgba(16, 71, 37, .16); border-radius: 26px; overflow: hidden; background: #fff; box-shadow: 0 32px 80px rgba(23, 70, 40, .18); transform: rotate(1.2deg); }
.demo-bar { height: 54px; display: flex; align-items: center; gap: 12px; padding: 0 18px; border-bottom: 1px solid var(--line); background: #f8faf7; font-size: 12px; }
.demo-bar > span { display: flex; gap: 5px; }
.demo-bar i { width: 7px; height: 7px; border-radius: 50%; background: #b9c7bd; }
.demo-bar strong { font-size: 13px; }
.demo-bar em { margin-left: auto; padding: 3px 9px; border-radius: 20px; color: var(--green); background: var(--green-soft); font-style: normal; font-weight: 700; }
.demo-content { padding: 18px; }
.brief-card { padding: 15px 16px; border: 1px dashed #c8d8cc; border-radius: 15px; background: #fcfdfb; }
.brief-card > p { margin: 0 0 8px; color: var(--muted); font-size: 11px; font-weight: 800; }
.brief-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.brief-tags span { padding: 4px 9px; border-radius: 7px; color: var(--green-deep); background: #e7f5e9; font-size: 11px; font-weight: 700; }
.brief-card blockquote { margin: 10px 0 0; color: #37463d; font-size: 13px; line-height: 1.55; }
.arrow-down { height: 27px; text-align: center; color: #8aa493; font-weight: 900; }
.script-card { padding: 18px; border-radius: 16px; color: #eaf7ed; background: #123b25; }
.script-label { display: flex; justify-content: space-between; gap: 12px; font-size: 10px; }
.script-label span { color: var(--lime); font-weight: 850; letter-spacing: .08em; }
.script-label b { color: #aac7b3; font-weight: 500; }
.script-card h2 { margin: 10px 0 12px; color: #fff; font-size: 19px; line-height: 1.4; letter-spacing: -.01em; }
.script-card p { margin: 8px 0; color: #d1e2d5; font-size: 12px; line-height: 1.65; }
.script-card mark { padding: 2px 5px; border-radius: 4px; color: #193b25; background: var(--lime); font-size: 10px; font-weight: 850; }
.script-footer { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 13px; padding-top: 11px; border-top: 1px solid rgba(255, 255, 255, .12); }
.script-footer span { padding: 3px 7px; border: 1px solid rgba(255, 255, 255, .15); border-radius: 6px; color: #bbd1c0; font-size: 9px; }

.page-content { padding-block: 30px 100px; }
.trust-strip { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 12px; border: 1px solid var(--line); border-radius: 17px; background: #fff; box-shadow: 0 12px 35px rgba(21, 52, 31, .06); }
.trust-strip span { position: relative; padding: 19px 26px 19px 54px; color: #405047; font-size: 14px; font-weight: 650; }
.trust-strip span::before { content: "✓"; position: absolute; left: 27px; top: 19px; display: grid; place-items: center; width: 19px; height: 19px; border-radius: 50%; color: #fff; background: var(--green); font-size: 11px; }
.trust-strip span + span { border-left: 1px solid var(--line); }
.section { padding: 94px 0 30px; }
.section.tinted { position: relative; margin: 64px -54px 0; padding: 74px 54px; border-radius: 32px; background: #eff6ed; }
.section-heading { max-width: 780px; }
.section-heading h2, .proof-note h2, .agency-note h2, .closing-cta h2 { margin: 0; font-size: clamp(30px, 4vw, 46px); line-height: 1.24; letter-spacing: -.035em; }
.section-heading > p:last-child { margin: 20px 0 0; color: var(--muted); font-size: 17px; }
.feature-grid, .audience-grid, .plan-grid { display: grid; gap: 18px; margin-top: 42px; }
.feature-grid.three { grid-template-columns: repeat(3, 1fr); }
.feature-card, .audience-card, .plan-card { border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.feature-card { padding: 30px; }
.feature-card b { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; color: var(--green); background: var(--green-soft); font-size: 13px; }
.feature-card h3, .audience-card h3 { margin: 21px 0 10px; font-size: 21px; line-height: 1.4; }
.feature-card p, .audience-card p { margin: 0; color: var(--muted); font-size: 14px; }
.audience-grid { grid-template-columns: repeat(4, 1fr); }
.audience-card { min-height: 280px; display: flex; flex-direction: column; padding: 27px; transition: transform .2s ease, box-shadow .2s ease; }
.audience-card:hover { transform: translateY(-5px); box-shadow: 0 20px 45px rgba(19, 66, 36, .1); }
.audience-card > span { color: var(--green); font-size: 13px; font-weight: 900; }
.audience-card strong { margin-top: auto; padding-top: 22px; color: var(--green); font-size: 13px; }
.workflow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0; margin: 48px 0 0; padding: 0; list-style: none; }
.workflow li { position: relative; text-align: center; }
.workflow li::after { content: ""; position: absolute; left: calc(50% + 24px); right: calc(-50% + 24px); top: 23px; height: 1px; background: #bbcdc0; }
.workflow li:last-child::after { display: none; }
.workflow li > span { position: relative; z-index: 1; display: grid; place-items: center; width: 46px; height: 46px; margin: 0 auto; border: 5px solid var(--cream); border-radius: 50%; color: #fff; background: var(--green); font-size: 13px; font-weight: 850; }
.workflow h3 { margin: 13px 0 3px; font-size: 16px; }
.workflow p { margin: 0 auto; max-width: 135px; color: var(--muted); font-size: 12px; line-height: 1.55; }
.proof-note { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; }
.proof-note > div { max-width: 760px; }
.proof-note p:not(.kicker) { color: var(--muted); }
.text-link { color: var(--green); font-weight: 800; white-space: nowrap; }
.deliverable { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; margin-top: 38px; }
.deliverable > div { padding: 26px; border-top: 3px solid var(--green); border-radius: 5px 5px 16px 16px; background: #fff; box-shadow: 0 12px 32px rgba(19, 66, 36, .07); }
.deliverable span { color: var(--green); font-weight: 850; }
.deliverable p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.contact-grid article { display: flex; flex-direction: column; padding: 24px; border-radius: 16px; background: #fff; }
.contact-grid span { color: var(--muted); font-size: 13px; }
.contact-grid strong { margin-top: 6px; color: var(--green-deep); font-size: 18px; }

.plans-section { padding-top: 72px; }
.plan-grid { grid-template-columns: repeat(4, 1fr); align-items: stretch; }
.plan-card { position: relative; display: flex; flex-direction: column; padding: 28px; }
.plan-card.recommended { border: 2px solid var(--green); box-shadow: 0 20px 50px rgba(22, 101, 52, .13); }
.recommend-label { position: absolute; right: 16px; top: 16px; padding: 4px 8px; border-radius: 6px; color: var(--green); background: var(--green-soft); font-size: 10px; font-weight: 850; }
.plan-card h3 { margin: 0; font-size: 21px; }
.price { margin: 14px 0 8px; }
.price span { color: var(--green); font-weight: 800; }
.price strong { color: var(--green-deep); font-size: 42px; line-height: 1; letter-spacing: -.04em; }
.price small { color: var(--muted); }
.plan-card > p:not(.price) { min-height: 77px; color: var(--muted); font-size: 13px; }
.plan-card ul { flex: 1; margin: 15px 0 25px; padding: 16px 0 0; border-top: 1px solid var(--line); list-style: none; }
.plan-card li { margin: 8px 0; padding-left: 21px; color: #405047; font-size: 13px; }
.plan-card li::before { content: "✓"; margin-left: -21px; margin-right: 8px; color: var(--green); font-weight: 900; }
.agency-note { display: flex; align-items: center; justify-content: space-between; gap: 40px; margin-top: 30px; padding: 35px 40px; border-radius: 22px; color: #eaf4ed; background: var(--green-deep); }
.agency-note > div { max-width: 760px; }
.agency-note .kicker { color: var(--lime); }
.agency-note h2 { font-size: 28px; }
.agency-note p:last-child { margin: 10px 0 0; color: #bfd0c4; }
.agency-note .button.secondary { border-color: #fff; color: #fff; }
.agency-note .button.secondary:hover { background: rgba(255, 255, 255, .1); }

.faq-section { max-width: 900px; margin-inline: auto; }
.faq-section details { border-bottom: 1px solid var(--line); background: #fff; }
.faq-section details:first-child { border-radius: 18px 18px 0 0; }
.faq-section details:last-child { border: 0; border-radius: 0 0 18px 18px; }
.faq-section summary { position: relative; padding: 23px 58px 23px 26px; cursor: pointer; font-size: 17px; font-weight: 800; list-style: none; }
.faq-section summary::-webkit-details-marker { display: none; }
.faq-section summary::after { content: "+"; position: absolute; right: 25px; top: 19px; color: var(--green); font-size: 24px; font-weight: 400; }
.faq-section details[open] summary::after { content: "−"; }
.faq-section details p { margin: 0; padding: 0 26px 25px; color: var(--muted); }
.legal-copy { max-width: 900px; margin-inline: auto; padding-top: 55px; }
.legal-copy article { padding: 30px 0; border-bottom: 1px solid var(--line); }
.legal-copy h2 { margin: 0; font-size: 22px; }
.legal-copy p { margin: 12px 0 0; color: #4f5e54; }

.closing-cta { padding: 88px 0; color: #fff; background: var(--green); text-align: center; }
.closing-cta .shell { max-width: 850px; }
.closing-cta .kicker { color: var(--lime); }
.closing-cta h2 { margin-inline: auto; }
.closing-cta div > div { display: flex; align-items: center; justify-content: center; gap: 24px; margin-top: 30px; }
.light-link { color: #fff; }
.site-footer { padding: 68px 0 24px; color: #c6d5ca; background: #10251a; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.25fr; gap: 60px; }
.footer-brand strong { color: #fff; }
.footer-brand small { color: #9fb3a5; }
.footer-grid > div:first-child > p { max-width: 370px; margin: 22px 0 0; color: #9fb3a5; font-size: 14px; }
.footer-grid h2 { margin: 0 0 17px; color: #fff; font-size: 14px; }
.footer-grid > div:not(:first-child) { display: flex; flex-direction: column; gap: 9px; }
.footer-grid a, .footer-grid span { font-size: 13px; }
.footer-grid a:hover { color: var(--lime); }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; margin-top: 54px; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .1); color: #8fa295; font-size: 12px; }
.not-found { min-height: 560px; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.not-found h1 { margin: 0; font-size: clamp(46px, 7vw, 84px); line-height: 1.1; }
.not-found p:not(.eyebrow) { max-width: 620px; color: var(--muted); font-size: 18px; }
.not-found .button { margin-top: 18px; }

@media (max-width: 1040px) {
  .main-nav { gap: 18px; }
  .hero-grid { grid-template-columns: 1fr 1fr; gap: 42px; }
  .audience-grid, .plan-grid { grid-template-columns: repeat(2, 1fr); }
  .deliverable { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.6fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 2 / 4; }
}

@media (max-width: 820px) {
  .header-inner { min-height: 68px; flex-wrap: wrap; gap: 10px 20px; padding-block: 10px; }
  .brand small { display: none; }
  .main-nav { order: 3; width: 100%; margin: 0; padding: 8px 0 2px; gap: 22px; overflow-x: auto; }
  .main-nav a { white-space: nowrap; }
  .main-nav a[aria-current="page"]::after { bottom: -4px; }
  .header-actions { margin-left: auto; }
  .hero-grid, .home-hero .hero-grid { min-height: 0; grid-template-columns: 1fr; padding-block: 68px; }
  .home-hero .hero-grid { gap: 48px; }
  .writer-demo { width: min(600px, 100%); margin-inline: auto; transform: none; }
  .hero-watermark { min-height: 150px; transform: none; }
  .feature-grid.three { grid-template-columns: 1fr; }
  .workflow { grid-template-columns: repeat(3, 1fr); gap: 34px 0; }
  .workflow li:nth-child(3)::after, .workflow li:last-child::after { display: none; }
  .section.tinted { margin-inline: -20px; padding-inline: 20px; border-radius: 22px; }
  .trust-strip { grid-template-columns: 1fr; }
  .trust-strip span + span { border-top: 1px solid var(--line); border-left: 0; }
  .proof-note { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 620px) {
  .shell { width: min(100% - 28px, 1180px); }
  .brand-mark { width: 38px; height: 38px; }
  .brand strong { font-size: 16px; }
  .login-link { display: none; }
  .button.small { min-height: 38px; padding-inline: 13px; font-size: 12px; }
  .hero-grid, .home-hero .hero-grid { padding-block: 54px; }
  .hero h1, .home-hero h1 { font-size: 40px; }
  .lead { font-size: 16px; }
  .hero-actions .button { width: 100%; }
  .demo-bar em { display: none; }
  .page-content { padding-bottom: 70px; }
  .section { padding-top: 68px; }
  .section.tinted { margin-top: 42px; padding-block: 56px; }
  .section-heading h2, .proof-note h2, .closing-cta h2 { font-size: 31px; }
  .audience-grid, .plan-grid, .deliverable, .contact-grid { grid-template-columns: 1fr; }
  .audience-card { min-height: 230px; }
  .workflow { grid-template-columns: repeat(2, 1fr); }
  .workflow li:nth-child(3)::after { display: block; }
  .workflow li:nth-child(2n)::after { display: none; }
  .agency-note { align-items: flex-start; flex-direction: column; padding: 28px; }
  .agency-note .button { width: 100%; }
  .closing-cta { padding: 68px 0; }
  .closing-cta div > div { flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px 22px; }
  .footer-grid > div:first-child, .footer-grid > div:last-child { grid-column: 1 / 3; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}