/* Granola.ai 风格：浅色、柔和绿橘渐变、圆角卡片、留白、Pill/Chip、Logo 墙、评价瀑布流 */
:root{
--bg:#ffffff; /* 背景 */
--ink:#0b0c0f; /* 主文字 */
--muted:#475569; /* 次文字 */
--line:#e4e6eb; /* 细线 */
--brand:#0fa36a; /* 品牌主色（绿色系） */
--brand-ink:#064e3b; /* 品牌深色 */
--soft:#f0fff4; /* 浅绿背景 */
--radius:18px;
--shadow:0 10px 30px rgba(0,0,0,.08);
--shadow-strong:0 18px 60px rgba(0,0,0,.15);
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family: ui-sans-serif, system-ui,-apple-system, Segoe UI, Roboto, "PingFang SC","Hiragino Sans GB","Microsoft YaHei", Helvetica, Arial, sans-serif;line-height:1.6}
img{display:block;max-width:100%;height:auto}
a{text-decoration:none;color:inherit}
.container{max-width:1180px;margin:0 auto;padding:0 16px}
.skip-link{position:absolute;left:-999px;top:0;background:#111;color:#fff;padding:6px 10px;border-radius:8px}
.skip-link:focus{left:10px;top:10px;z-index:1000}


/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.7);backdrop-filter:blur(10px) saturate(160%);border-bottom:1px solid var(--line)}
.header__row{display:flex;align-items:center;justify-content:space-between;padding:.75rem 0}
.brand{display:flex;align-items:center;gap:.6rem}
.brand__name{font-weight:700}
.nav{display:none}
.nav__list{display:flex;gap:1rem;list-style:none;margin:0;padding:0}
.nav-toggle{display:inline-flex;flex-direction:column;gap:4px;width:36px;height:36px;border:1px solid var(--line);background:transparent;border-radius:12px;align-items:center;justify-content:center}
.nav-toggle__bar{width:18px;height:2px;background:#111;border-radius:1px}
@media (min-width:860px){.nav{display:block}.nav-toggle{display:none}}


/* Sections */
.section{padding:clamp(56px,7vw,112px) 0}
.section--alt{background:#fbfbfb}
.section--flush{padding-top:clamp(36px,5vw,80px)}
.section__title{font-size:clamp(24px,2.4vw,34px);margin:0 0 14px}
.eyebrow{text-transform:uppercase;letter-spacing:.18em;color:var(--muted);font-size:.8rem}
.muted{color:var(--muted)}
.accent{color:var(--brand-ink)}


/* Gradients */
.gradient{position:absolute;inset:0;background:radial-gradient(60% 70% at 75% 20%, #e9fde8 0%, transparent 60%), radial-gradient(70% 80% at 20% 80%, #fff0d8 0%, transparent 60%);z-index:-1}
.gradient--soft{position:absolute;inset:0;background:radial-gradient(50% 60% at 50% 0%, #e9fde8 0%, transparent 60%), radial-gradient(60% 60% at 50% 100%, #fff0d8 0%, transparent 65%);z-index:-1}


/* Hero */
.hero{position:relative;overflow:hidden}
.hero__inner{position:relative}
.hero__title{font-size:clamp(36px,6vw,64px);line-height:1.08;margin:.35em 0 .2em}
.hero__subtitle{max-width:760px;color:var(--muted)}
.actions{margin-top:18px;display:flex;gap:.75rem;flex-wrap:wrap}


/* Hero screens */
.hero-screens{margin-top:32px;display:grid;gap:18px;grid-template-columns:repeat(1,minmax(0,1fr))}
@media(min-width:900px){.hero-screens{grid-template-columns:repeat(2,1fr)}}
.screen{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}
.screen__hd{height:34px;background:#fafafa;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:6px;padding:0 10px}
.screen__hd .dot{width:9px;height:9px;border-radius:50%;background:#e5e7eb}
.screen__bd{padding:16px}
.screen__title{margin:0 0 4px;font-size:16px}
.screen__text{margin:8px 0 12px;color:var(--muted)}
.screen__bar{height:8px;border-radius:999px;background:linear-gradient(90deg,#e5f7ef,#c7f9d4)}
.screen--primary{border-color:#b9f4ce;box-shadow:var(--shadow-strong)}
.screen__list{margin:6px 0 0 18px;color:var(--muted)}


/* Trust */
.trust__title{color:var(--muted);margin-bottom:10px;text-align:center}
.logo-wall{list-style:none;margin:0;padding:0;display:grid;gap:10px;grid-template-columns:repeat(6,1fr)}
.logo-item{background:#fff;border:1px solid var(--line);border-radius:12px;min-height:48px;display:grid;place-items:center;color:#9aa0a6;font-weight:600}
@media(max-width:760px){.logo-wall{grid-template-columns:repeat(3,1fr)}}


/* Works icons */
.works__inner{text-align:center}
.app-icons{display:flex;justify-content:center;gap:12px;list-style:none;margin:14px 0 0;padding:0;flex-wrap:wrap}
.app-icons__item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:.5rem .8rem;box-shadow:var(--shadow);font-weight:700;color:var(--brand-ink)}


/* How it works */
.grid{display:grid;gap:16px}
.grid--how{grid-template-columns:repeat(1,1fr)}
@media(min-width:900px){.grid--how{grid-template-columns:repeat(3,1fr)}}
.how__card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.how__card h3{margin:0 0 6px}

* Cards + chips */
.grid--cards{grid-template-columns:repeat(1,minmax(0,1fr))}
@media(min-width:760px){.grid--cards{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1120px){.grid--cards{grid-template-columns:repeat(4,1fr)}}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.card h3{margin:0 0 6px}
.chips{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;padding:.45rem .8rem;border-radius:999px;background:#f5f7f9;border:1px solid var(--line);color:#111}


/* Bubble cloud */
.bubble-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px;justify-content:center}
.bubble{padding:.55rem .9rem;border-radius:999px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);cursor:default}
.bubble:hover{transform:translateY(-1px)}


/* Share */
.share{display:grid;gap:18px;grid-template-columns:1fr}
@media(min-width:980px){.share{grid-template-columns:1.1fr .9fr}}
.pill-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.pill{display:inline-flex;align-items:center;padding:.45rem .8rem;border-radius:999px;background:#f1f5f9;border:1px solid var(--line);color:#0f172a}
.share__art{height:220px;border-radius:24px;border:1px solid var(--line);background:radial-gradient(140px 140px at 70% 40%, #e9fde8 0%, transparent 60%), linear-gradient(180deg, rgba(15,163,106,.08), transparent)}


/* Tweet wall */
.wall{columns:1 320px;column-gap:14px}
@media(min-width:780px){.wall{columns:2 320px}}
@media(min-width:1120px){.wall{columns:3 320px}}
.tweet{display:inline-block;width:100%;background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px;margin:0 0 14px;box-shadow:var(--shadow)}
.tweet header{display:flex;gap:10px;align-items:center;margin-bottom:6px}
.avatar{width:28px;height:28px;border-radius:999px;background:#e2e8f0;display:grid;place-items:center;font-weight:700;color:#0f172a}
.tweet p{margin:8px 0;color:#0f172a}
.tweet footer{display:flex;gap:8px;margin-top:8px}
.tweet button{padding:.35rem .6rem;border-radius:999px;border:1px solid var(--line);background:#f8fafc;cursor:pointer}


/* CTA */
.section--cta{position:relative;overflow:hidden;border-top:1px solid var(--line)}
.cta{text-align:center;position:relative}
.cta__title{margin:0 0 6px;font-size:clamp(24px,2.6vw,36px)}
.cta__desc{color:var(--muted);margin-bottom:12px}
.cta__btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}


/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1rem;border-radius:999px;background:var(--brand);color:#fff;border:1px solid var(--brand);font-weight:800}
.btn:hover{filter:brightness(.98)}
.btn--ghost{background:transparent;color:#111;border:1px solid var(--line)}
.btn--inverse{background:transparent;color:var(--brand-ink);border:1px solid var(--brand)}


/* Footer */
.site-footer{border-top:1px solid var(--line);background:#fafafa}
.footer__row{display:grid;gap:10px;align-items:center;grid-template-columns:1fr;padding:16px 0}
.footer__nav{display:flex;gap:12px;justify-self:start;flex-wrap:wrap}
@media(min-width:780px){.footer__row{grid-template-columns:auto 1fr auto}.footer__nav{justify-self:end}}


/* On-scroll elevate */
[data-elevate].is-stuck{box-shadow:0 12px 24px rgba(0,0,0,.06)}


/* Reveal */
[data-io]{opacity:0;transform:translateY(10px);transition:opacity .5s ease, transform .5s ease}
[data-io].is-in{opacity:1;transform:none}