:root { --ink: #17211c; --muted: #667169; --line: #d9dfd8; --paper: #f7f8f5; --panel: #ffffff; --accent: #1e604b; --accent-soft: #e5f0e9; font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", ui-sans-serif, system-ui, sans-serif; color: var(--ink); background: var(--paper); }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; line-height: 1.5; }
a { color: inherit; }
.site-header { width: min(1120px, calc(100% - 48px)); height: 76px; margin: 0 auto; display: flex; align-items: center; gap: 32px; border-bottom: 1px solid var(--line); }
.brand { text-decoration: none; font-size: 1.05rem; font-weight: 800; letter-spacing: -.03em; }
nav { display: flex; gap: 22px; margin-left: auto; }
nav a, .header-contact { color: var(--muted); text-decoration: none; font-size: .9rem; }
.header-contact { color: var(--accent); font-weight: 700; }
main { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.hero { display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(420px, .98fr); gap: clamp(48px, 7vw, 110px); align-items: center; padding: clamp(76px, 11vw, 136px) 0 100px; }
.eyebrow { margin: 0 0 16px; color: var(--accent); font-size: .76rem; font-weight: 800; letter-spacing: .11em; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 660px; margin-bottom: 25px; font-size: clamp(2.8rem, 5.2vw, 4.8rem); line-height: 1.07; letter-spacing: -.07em; }
.lede { max-width: 550px; margin-bottom: 28px; color: #465149; font-size: 1.12rem; line-height: 1.75; }
.hero-actions { display: flex; align-items: center; gap: 24px; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 0 19px; border-radius: 4px; text-decoration: none; font-weight: 750; }
.primary { background: var(--accent); color: #fff; }
.text-link { color: var(--accent); font-weight: 700; text-underline-offset: 4px; }
.guardrail { margin: 24px 0 0; color: var(--muted); font-size: .88rem; }
.product-preview { overflow: hidden; border: 1px solid #cbd4cc; border-radius: 8px; background: var(--panel); box-shadow: 0 16px 34px rgba(29, 48, 37, .08); }
.preview-bar { display: flex; justify-content: space-between; padding: 13px 17px; border-bottom: 1px solid var(--line); color: #536057; font-size: .78rem; font-weight: 700; }
.preview-content { padding: 25px 27px; }
.preview-label { margin-bottom: 8px; color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .1em; }
.rfq-question { margin-bottom: 20px; font-size: .95rem; line-height: 1.55; }
.preview-rule { height: 1px; margin: 19px 0; background: var(--line); }
.source-list { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; color: #3f4a42; font-size: .83rem; }
.source-list li { display: flex; gap: 10px; }
.source-list span { color: #88938b; font-size: .72rem; }
.draft-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.draft-heading span { color: #766136; font-size: .7rem; font-weight: 700; }
.draft-copy { margin: 0; color: #354238; font-size: .88rem; line-height: 1.62; }
.preview-foot { margin: 0; padding: 13px 17px; border-top: 1px solid var(--line); background: #f4f7f3; color: #617065; font-size: .77rem; }
.workflow, .demo { padding: 92px 0; border-top: 1px solid var(--line); }
.workflow { display: grid; grid-template-columns: minmax(280px, .72fr) minmax(0, 1.28fr); gap: clamp(42px, 8vw, 120px); }
.section-intro h2 { max-width: 570px; margin-bottom: 16px; font-size: clamp(2rem, 3.2vw, 3rem); line-height: 1.16; letter-spacing: -.055em; }
.section-intro > p:not(.eyebrow) { max-width: 590px; margin-bottom: 0; color: var(--muted); line-height: 1.65; }
.workflow ol { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.workflow li { display: grid; grid-template-columns: 48px 1fr; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.step-number { color: var(--accent); font-size: .76rem; font-weight: 800; }
.workflow h3 { margin-bottom: 5px; font-size: 1rem; }
.workflow li p { margin: 0; color: var(--muted); font-size: .94rem; }
.demo { display: grid; grid-template-columns: .73fr 1.27fr; gap: clamp(42px, 7vw, 98px); }
.demo-layout { display: grid; gap: 18px; align-content: start; }
.demo-form { padding: 0; }
label { display: block; margin-bottom: 9px; font-size: .91rem; font-weight: 750; }
textarea { width: 100%; min-height: 142px; padding: 14px; border: 1px solid #bac6bd; border-radius: 4px; background: #fff; color: inherit; font: inherit; resize: vertical; }
textarea:focus { outline: 2px solid #b9d7c6; outline-offset: 2px; }
button { margin-top: 13px; min-height: 46px; padding: 0 16px; border: 0; border-radius: 4px; background: var(--accent); color: #fff; font: inherit; font-weight: 750; cursor: pointer; }
button:hover, .primary:hover { background: #174c3b; }
#draft-result { min-height: 20px; }
.status { display: inline-block; margin-bottom: 10px; color: #766136; font-size: .75rem; font-weight: 800; }
pre { overflow: auto; margin: 0; padding: 16px; border: 1px solid var(--line); border-radius: 4px; background: #fff; color: #2b3930; white-space: pre-wrap; font: .82rem/1.55 ui-monospace, SFMono-Regular, Menlo, monospace; }
.warning { padding: 13px 0; color: #704737; border-top: 1px solid #d8c5bb; border-bottom: 1px solid #d8c5bb; }
.demo-gif { grid-column: 2; margin: 8px 0 0; border-top: 1px solid var(--line); }
.demo-gif img { display: block; width: 100%; height: auto; margin-top: 14px; border: 1px solid var(--line); }
.demo-gif figcaption { margin-top: 9px; color: var(--muted); font-size: .8rem; }
.boundary { display: grid; grid-template-columns: 150px 1fr; gap: 20px; margin: 0 0 88px; padding: 20px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.boundary p { margin: 0; }
.boundary p + p { grid-column: 2; margin-top: -10px; }
.boundary strong { color: var(--ink); }
footer { width: min(1120px, calc(100% - 48px)); margin: 0 auto; padding: 24px 0 42px; color: #7d887f; border-top: 1px solid var(--line); font-size: .8rem; }
@media (max-width: 760px) { .site-header, main, footer { width: min(100% - 32px, 1120px); } .site-header { height: 64px; gap: 15px; } nav { display: none; } .header-contact { margin-left: auto; } .hero, .workflow, .demo { grid-template-columns: 1fr; } .hero { gap: 46px; padding: 64px 0 72px; } h1 { font-size: clamp(2.55rem, 12vw, 3.8rem); } .workflow, .demo { gap: 36px; padding: 64px 0; } .demo-gif { grid-column: auto; } .boundary { grid-template-columns: 1fr; margin-bottom: 56px; } .boundary p + p { grid-column: auto; margin-top: 0; } }