/* IdeaParter 样式 —— 沿用 ScienceParter 绿色科学风（同色板） */
:root {
  --g50: #f2faf4; --g100: #e3f4e7; --g300: #a3e3b8; --g400: #6fd08e; --g500: #4cbb6e; --g600: #2e9e57;
  --ink900: #224437; --ink600: #3c5a4b; --ink400: #6d887b;
  --grad: linear-gradient(135deg, #45b763 0%, #4cbb6e 45%, #66c37f 100%);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; color: #233; background: #fff; line-height: 1.6; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; }
.pc-br { display: none; }
@media (min-width: 768px) { .pc-br { display: inline; } }

/* 导航 */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(255,255,255,.92); backdrop-filter: blur(10px); transition: box-shadow .25s; }
.nav.scrolled { box-shadow: 0 4rpx 24rpx rgba(34,68,55,.08); }
.nav-inner { max-width: 1080px; margin: 0 auto; padding: 14px 20px; display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 20px; font-weight: 800; color: var(--ink900); }
.logo span { color: var(--g600); }
.nav-links { display: none; gap: 22px; font-size: 14px; color: var(--ink600); }
@media (min-width: 768px) { .nav-links { display: flex; } }
.nav-cta { font-size: 13px; color: #fff; background: var(--grad); border-radius: 999px; padding: 8px 18px; box-shadow: 0 4px 12px rgba(76,187,110,.35); }

/* Hero */
.hero { background: linear-gradient(160deg, #f2faf4 0%, #e3f4e7 55%, #ffffff 100%); text-align: center; padding: 110px 24px 50px; }
.hero-badge { display: inline-block; font-size: 13px; color: var(--g600); background: #fff; border: 1px solid var(--g300); border-radius: 999px; padding: 6px 16px; }
.hero-slogan { font-size: clamp(34px, 6vw, 52px); font-weight: 800; color: var(--ink900); margin-top: 22px; letter-spacing: 2px; }
.hero-sub { font-size: 15px; color: var(--ink400); margin-top: 14px; line-height: 1.8; }
.hero-btns { margin-top: 30px; display: flex; flex-direction: column; align-items: center; gap: 12px; }
@media (min-width: 560px) { .hero-btns { flex-direction: row; justify-content: center; } }
.btn-main { display: inline-block; background: var(--grad); color: #fff; font-size: 16px; font-weight: 600; border-radius: 999px; padding: 14px 34px; box-shadow: 0 8px 24px rgba(76,187,110,.38); transition: transform .2s; }
.btn-main:hover { transform: translateY(-2px); }
.btn-line { display: inline-block; border: 1.5px solid var(--g500); color: var(--g600); font-size: 15px; border-radius: 999px; padding: 12px 30px; background: #fff; }
.hero-stats { display: flex; max-width: 640px; margin: 44px auto 0; background: #fff; border-radius: 16px; padding: 20px 0; box-shadow: 0 6px 24px rgba(46,158,87,.08); }
.stat { flex: 1; }
.stat + .stat { border-left: 1px solid #eef5f0; }
.stat-num { font-size: 22px; font-weight: 800; color: var(--g600); }
.stat-label { font-size: 12px; color: var(--ink400); margin-top: 4px; padding: 0 6px; }

/* 通用 section */
.sec { max-width: 1080px; margin: 0 auto; padding: 64px 22px 30px; }
.sec.alt { max-width: none; background: var(--g50); }
.sec.alt > * { max-width: 1080px; margin-left: auto; margin-right: auto; }
.sec-title { font-size: clamp(24px, 4vw, 32px); font-weight: 800; color: var(--ink900); text-align: center; }
.sec-sub { font-size: 14px; color: var(--ink400); text-align: center; margin: 12px 0 34px; }
.grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 700px) { .grid { grid-template-columns: repeat(3, 1fr); } }
.card { background: #fff; border-radius: 16px; padding: 26px 24px; box-shadow: 0 6px 24px rgba(46,158,87,.08); }
.sec.alt .card { box-shadow: 0 4px 18px rgba(46,158,87,.06); }
.card-t { font-size: 18px; font-weight: 700; color: var(--ink600); }
.card-d { font-size: 14px; color: #5a6b62; line-height: 1.75; margin-top: 10px; }
.pill { display: inline-block; font-size: 12px; color: var(--g600); background: var(--g100); border-radius: 999px; padding: 4px 14px; margin-top: 14px; }

/* 聊天区 */
.chat-wrap { max-width: 760px; margin: 0 auto; }
.chat-box { background: #fff; border: 1px solid #e8f2ec; border-radius: 18px; padding: 20px; height: 420px; overflow-y: auto; box-shadow: 0 6px 24px rgba(46,158,87,.08); }
.msg { display: flex; margin-bottom: 14px; }
.msg.user { justify-content: flex-end; }
.bubble { max-width: 84%; padding: 12px 16px; border-radius: 14px; font-size: 14.5px; line-height: 1.75; white-space: pre-wrap; word-break: break-word; }
.msg.ai .bubble { background: var(--g50); color: #2a3d33; border: 1px solid #e3f0e8; }
.msg.user .bubble { background: var(--grad); color: #fff; }
.bubble.dim, .dim { color: #8ba294; font-size: 13px; }
.bubble .h { font-weight: 700; color: var(--g600); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.chip { font-size: 13px; color: var(--g600); background: #fff; border: 1px solid var(--g300); border-radius: 999px; padding: 7px 14px; transition: background .2s; }
.chip:hover { background: var(--g100); }
.input-row { display: flex; gap: 10px; margin-top: 14px; align-items: flex-end; }
.input-row textarea { flex: 1; resize: none; border: 1.5px solid var(--g300); border-radius: 14px; padding: 12px 14px; font-size: 15px; font-family: inherit; line-height: 1.6; outline: none; transition: border .2s; }
.input-row textarea:focus { border-color: var(--g500); box-shadow: 0 0 0 3px rgba(76,187,110,.15); }
.send-btn { background: var(--grad); color: #fff; border: none; font-size: 15px; font-weight: 600; border-radius: 14px; padding: 13px 26px; box-shadow: 0 6px 18px rgba(76,187,110,.35); flex-shrink: 0; }
.send-btn:disabled { opacity: .55; cursor: not-allowed; }
.chat-foot { font-size: 12px; color: #a3b5aa; text-align: center; margin-top: 12px; }

/* 路径 */
.step { display: flex; align-items: flex-start; background: #fff; border-radius: 16px; padding: 24px; margin: 0 auto 16px; max-width: 760px; box-shadow: 0 6px 24px rgba(46,158,87,.08); }
.step-no { width: 44px; height: 44px; border-radius: 50%; background: var(--grad); color: #fff; font-size: 20px; font-weight: 800; text-align: center; line-height: 44px; margin-right: 18px; flex-shrink: 0; }
.step-body { flex: 1; }
.step-t { font-size: 17px; font-weight: 700; color: var(--ink600); }
.step-d { font-size: 14px; color: #5a6b62; line-height: 1.75; margin-top: 8px; }
.step-tag { display: inline-block; font-size: 12px; color: var(--g600); background: var(--g100); border-radius: 999px; padding: 4px 14px; margin-top: 12px; }

/* FAQ */
.faq { background: #fff; border-radius: 14px; padding: 20px 24px; margin-bottom: 12px; max-width: 760px; margin-left: auto; margin-right: auto; box-shadow: 0 4px 16px rgba(46,158,87,.06); }
.faq-q { display: flex; justify-content: space-between; align-items: center; font-size: 15.5px; font-weight: 600; color: var(--ink600); cursor: pointer; }
.faq-mark { color: var(--g600); font-size: 20px; margin-left: 16px; flex-shrink: 0; }
.faq-a { font-size: 14px; color: #5a6b62; line-height: 1.8; margin-top: 14px; display: none; }
.faq.open .faq-a { display: block; }
.faq.open .faq-mark { transform: rotate(45deg); }

/* 传统AI vs Agent Team */
.vs { display: flex; gap: 14px; max-width: 860px; margin: 0 auto; flex-direction: column; }
@media (min-width: 700px) { .vs { flex-direction: row; } }
.vs-col { flex: 1; border-radius: 18px; padding: 26px 24px; }
.vs-old { background: #f4f6f5; }
.vs-new { background: linear-gradient(160deg, #2e9e57, #45b763); box-shadow: 0 10px 28px rgba(46,158,87,.25); }
.vs-h { font-size: 17px; font-weight: 800; text-align: center; margin-bottom: 16px; color: var(--ink600); }
.vs-old .vs-h { color: #8a9a91; }
.vs-new .vs-h { color: #fff; }
.vs-i { font-size: 14px; line-height: 1.7; margin-bottom: 10px; color: #5a6b62; }
.vs-new .vs-i { color: #eafaf0; }

/* CTA & footer */
.cta { margin: 40px auto 0; max-width: 1000px; background: linear-gradient(160deg, #2e9e57, #45b763); border-radius: 24px; padding: 46px 30px; text-align: center; width: calc(100% - 44px); }
.cta-t { font-size: clamp(22px, 4vw, 30px); font-weight: 800; color: #fff; }
.cta-d { font-size: 14px; color: #d9f2e2; margin-top: 12px; }
.cta-btn { margin-top: 26px; }
.foot { text-align: center; color: var(--ink400); font-size: 13px; padding: 44px 0 60px; line-height: 2; }

/* 打字中动画 */
.typing { display: inline-flex; gap: 5px; align-items: center; }
.typing i { width: 7px; height: 7px; border-radius: 50%; background: var(--g400); display: inline-block; animation: blink 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: .2s; }
.typing i:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }

/* v3 信任飞轮 */
.wheel { display: grid; grid-template-columns: 1fr; gap: 10px; max-width: 860px; margin: 0 auto; align-items: stretch; }
@media (min-width: 760px) { .wheel { grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; } .wheel-a { align-self: center; } }
.wheel-i { background: #fff; border: 1px solid #e3f0e8; border-radius: 16px; padding: 20px 18px; box-shadow: 0 4px 16px rgba(46,158,87,.06); }
.wheel-t { font-size: 16px; font-weight: 800; color: var(--ink600); }
.wheel-d { font-size: 13px; color: #5a6b62; line-height: 1.7; margin-top: 8px; }
.wheel-a { font-size: 22px; color: var(--g500); font-weight: 800; text-align: center; }
.wheel-red { max-width: 860px; margin: 18px auto 0; background: #fff4f2; border: 1px solid #ffd9d2; border-left: 6px solid #e05d44; border-radius: 14px; padding: 20px 22px; font-size: 13.5px; color: #7a4438; line-height: 1.8; }
.wheel-red b { color: #c8442e; }

/* v3 Primary Agent 架构 */
.arch { max-width: 860px; margin: 0 auto; background: #fff; border-radius: 20px; padding: 30px 24px; box-shadow: 0 6px 24px rgba(46,158,87,.08); text-align: center; }
.arch-hub { display: inline-flex; flex-direction: column; align-items: center; gap: 2px; background: linear-gradient(160deg, #2e9e57, #45b763); color: #fff; border-radius: 18px; padding: 16px 34px; font-size: 26px; box-shadow: 0 10px 26px rgba(46,158,87,.3); }
.arch-hub span { font-size: 18px; font-weight: 800; letter-spacing: 1px; }
.arch-hub small { font-size: 12px; color: #d9f2e2; }
.arch-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 22px; }
@media (max-width: 560px) { .arch-grid { grid-template-columns: repeat(2, 1fr); } }
.arch-cell { border: 1.5px dashed #cfe6d8; border-radius: 14px; padding: 16px 8px; font-size: 14px; color: var(--ink600); background: #fbfefc; }
.arch-cell.on { border: 1.5px solid var(--g500); background: var(--g50); color: var(--g600); font-weight: 700; box-shadow: 0 4px 14px rgba(76,187,110,.18); }
.arch-cap { font-size: 13.5px; color: #5a6b62; line-height: 1.9; margin-top: 22px; }
.arch-cap b { color: var(--g600); }

/* v3 四步演进 状态标签 */
.st-now { background: var(--g500); color: #fff; }
.st-doing { background: #ffb84a; color: #6b4a00; }
.st-plan { background: #e8ecea; color: #5a6b62; }
.st-vis { background: #efe7ff; color: #6b46c1; }

/* v3 POL 愿景横幅 */
.ops-banner { max-width: 860px; margin: 20px auto 0; background: linear-gradient(160deg, #224437, #2e9e57); border-radius: 18px; padding: 30px 24px; text-align: center; color: #fff; font-size: 15px; line-height: 2; }
.ops-banner b { color: #a3e3b8; font-size: 17px; }