:root{--ink:#172326;--muted:#5b686b;--green:#08765f;--green2:#0ea886;--navy:#0a2f39;--cream:#f7f5ef;--line:#dbe5e1;--white:#fff;--warn:#fff8df}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;color:var(--ink);background:#fbfcfa;line-height:1.75}a{color:var(--green);text-decoration:none}a:hover{text-decoration:underline}.site-head{background:#071b22;color:#fff}.head-inner{max-width:1180px;margin:auto;padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:14px;color:#fff;font-weight:700}.brand img{width:148px;max-height:48px;object-fit:contain;background:#fff;border-radius:7px;padding:4px}.nav{display:flex;gap:18px;flex-wrap:wrap}.nav a{color:#dcebe6}.hero{background:linear-gradient(130deg,#082832,#075845 72%,#0ba584);color:#fff}.hero-inner{max-width:1180px;margin:auto;padding:72px 24px 66px}.eyebrow{margin:0 0 10px;color:#99ead1;font-weight:700;letter-spacing:.08em}.hero h1{max-width:900px;font-size:clamp(32px,5vw,56px);line-height:1.18;margin:0 0 18px}.hero .lead{max-width:880px;font-size:19px;color:#e4f3ef}.source-note{max-width:1180px;margin:0 auto;padding:15px 24px;background:#edf7f3;border-bottom:1px solid var(--line);color:#31524a}.wrap{max-width:1180px;margin:auto;padding:44px 24px 70px}.section{margin:0 0 46px}.section h2{font-size:28px;line-height:1.3;margin:0 0 18px}.section h3{font-size:20px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.fact-card,.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:0 8px 30px rgba(9,54,45,.055)}.fact-label{font-size:14px;color:var(--muted);margin:0}.fact-value{font-size:32px;line-height:1.2;font-weight:800;color:var(--green);margin:8px 0 14px}.fact-source{font-size:13px;color:var(--muted);margin-top:18px}.fact-note,.caveat{font-size:13px;color:#6e5b1a;background:var(--warn);padding:10px 12px;border-radius:9px}.pill{display:inline-block;padding:4px 10px;border-radius:99px;background:#e2f6ef;color:#07644f;font-size:13px;margin:3px}.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.step{background:#fff;border-left:4px solid var(--green2);padding:20px;border-radius:10px}.step:before{counter-increment:step;content:counter(step);display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--green);color:#fff;font-weight:700;margin-bottom:12px}.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:14px}table{border-collapse:collapse;width:100%;min-width:760px}th,td{text-align:left;vertical-align:top;padding:16px;border-bottom:1px solid var(--line)}th{background:#eff6f3}td small{display:block;color:var(--muted)}.grade{display:inline-block;padding:2px 8px;border-radius:99px;font-weight:700}.grade-a{background:#d9f5e8;color:#08704f}.grade-b{background:#e4efff;color:#215b9b}.grade-c{background:#f2ecdd;color:#755b1f}.callout{padding:22px;border-radius:14px;background:#eaf7f2;border:1px solid #c6e9dd}.links{display:flex;flex-wrap:wrap;gap:12px}.links a{display:inline-block;padding:9px 14px;border:1px solid var(--green);border-radius:8px}.site-foot{background:#071b22;color:#bcd0ca}.foot-inner{max-width:1180px;margin:auto;padding:30px 24px}.site-foot a{color:#d9f0e8}@media(max-width:820px){.head-inner{align-items:flex-start;flex-direction:column}.grid,.steps{grid-template-columns:1fr}.hero-inner{padding-top:50px}.hero .lead{font-size:17px}.fact-value{font-size:28px}}