:root{color-scheme:light;--ink:#172e27;--muted:#4e625a;--green:#1c664f;--line:#dbe3d9;--paper:#fff;--bg:#f3f5ef;--lime:#deefb2;--width:1216px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:.22em}
:focus-visible{outline:3px solid #409b72;outline-offset:4px}
button{font:inherit;cursor:pointer}
.progress{position:fixed;top:0;left:0;width:0;height:3px;background:#a9d887;z-index:10}
.header{position:sticky;top:0;z-index:9;background:#102b23f7;color:white;border-bottom:1px solid #335549;backdrop-filter:blur(14px)}
.header-inner{max-width:var(--width);margin:auto;padding:10px 28px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand,.header-right{display:flex;align-items:center;gap:12px;color:#f1f8ec;font-size:14px}
.brand{font-weight:720}
.brand-icon{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--lime);color:#16372a;font:italic 700 23px Georgia}
.brand-by{color:#b6c9bd;font-weight:500}
.header-right a{color:#d6e4dc}
.print{min-height:42px;background:transparent;color:white;border:1px solid #68857a;border-radius:8px;padding:0 12px;font-size:13px}
.print:hover{background:#315449}
.svg-sprite{position:absolute;width:0;height:0;overflow:hidden}
.hero{color:#f6faf1;background:radial-gradient(ellipse at 78% 25%,#254b3e,transparent 55%),#102b23}
.hero-inner{max-width:var(--width);margin:auto;padding:73px 28px 80px;display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,440px);column-gap:38px;align-content:center}
.hero-inner>*{grid-column:1}
.eyebrow,.summary-label,.section-tag,.side-label{letter-spacing:.12em;font-size:12px;font-weight:800}
.eyebrow{color:var(--lime);margin-bottom:17px}
h1{font-size:clamp(38px,5.4vw,72px);font-weight:800;line-height:1.08;letter-spacing:-.055em;margin:0}
.hero-desc{margin:18px 0;color:#d5e5dc;font-size:17px}
.meta{display:flex;flex-wrap:wrap;gap:5px 16px;color:#c2d3c7;font-size:13px}
.meta a{color:var(--lime);text-decoration:underline;text-underline-offset:3px}
.hero-cta{justify-self:start;margin-top:24px;padding:9px 15px;border-radius:8px;background:var(--lime);color:#183b2c;font-weight:760;display:flex;gap:16px;transition:background .2s,transform .2s}
.hero-cta:hover{background:#edf8d6;transform:translateY(-2px);text-decoration:none}





.layout{max-width:var(--width);margin:0 auto;padding:36px 28px 12px;display:grid;grid-template-columns:218px minmax(0,1fr);gap:34px}
.sidebar{position:sticky;top:88px;align-self:start;padding:14px;background:#eaf0e7;border:1px solid var(--line);border-radius:14px}
.side-label{display:flex;justify-content:space-between;padding:4px 9px 11px}
.side-label span{color:var(--green);font-family:ui-monospace,monospace}
.nav-links{display:grid;gap:3px}
.nav-item,.source-jump{display:flex;align-items:center;gap:9px;padding:9px;border-radius:7px;font-size:14px;color:#3e554a;min-height:44px}
.nav-item span{font:12px ui-monospace,monospace;color:#527264}
.nav-item:hover,.nav-item[aria-current]{background:#d8e8d7;color:#164931;text-decoration:none}
.nav-item[aria-current]{box-shadow:inset 3px 0 #367657;font-weight:700}
.source-jump{border-top:1px solid #d4e1d3;border-radius:0;margin-top:9px}
.main{min-width:0}
.summary,.section,.sources{background:var(--paper);border:1px solid var(--line);border-radius:17px;padding:clamp(20px,4vw,42px);margin:0 0 23px}
.summary{background:#e8efdf;border-color:#d0dfc7}
.summary-label,.section-tag{color:var(--green)}
.summary h2,.section h2{font-size:clamp(24px,3.1vw,35px);line-height:1.32;margin:8px 0 10px;letter-spacing:-.035em}
.summary p,.section-lead,.section-body p{margin:0 0 12px;color:var(--muted)}
.summary-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:11px;margin-top:22px}
.summary-point{position:relative;display:block;background:#fbfdf8;color:var(--ink);border:1px solid #d4e0cd;border-radius:11px;padding:13px 25px 13px 13px;transition:transform .2s,border-color .2s}
.summary-point:hover{transform:translateY(-3px);border-color:#699981;text-decoration:none}
.summary-point small{display:block;color:var(--green);font-size:11px;font-weight:750;letter-spacing:.06em;margin-bottom:6px}
.summary-point b{display:block;line-height:1.45;font-size:15px}
.point-arrow{position:absolute;right:10px;top:10px;color:var(--green)}
.section-top{display:flex;gap:17px;align-items:flex-start;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:22px}
.section-no{display:flex;flex-direction:column;align-items:center;gap:6px;font:12px ui-monospace,monospace;color:var(--green)}
.section-icon{display:grid;place-items:center;width:47px;height:47px;border-radius:12px;background:#e8f1e5;color:#24654f}
.section-icon svg{width:28px;height:28px}
.section h2{margin:3px 0 7px}
.section-lead{margin:0}
.subhead{font-size:18px;margin:23px 0 7px;line-height:1.45}
.subhead:first-child{margin-top:0}
.chips,.flow{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:14px 0 18px}
.chips span,.flow-step{background:#edf4ec;border:1px solid #dbe7d8;border-radius:8px;padding:7px 10px;font-size:14px}
.flow-step{display:flex;align-items:center;gap:8px}
.flow-step b,.issue-index{font:12px ui-monospace,monospace;color:var(--green)}
.flow-arrow{color:#59796b;font-style:normal}
.take,.focus-line,.formula{padding:13px 16px;background:#edf5ea;border-radius:8px;border-left:3px solid #5c906b;margin:14px 0;color:#224c37}
.take>span{font-weight:800;color:var(--green);font-size:13px}
.take p,.issue p{margin:3px 0 0}
.focus-line,.formula{font-weight:700}
.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px;margin:15px 0}
.metric{padding:12px;border:1px solid var(--line);border-radius:9px;background:#f7faf5}
.metric b,.metric span{display:block}
.metric span{font-size:13px;color:var(--muted);line-height:1.5}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:10px;margin:13px 0 18px}
table{width:100%;min-width:570px;border-collapse:collapse;font-size:14px;line-height:1.58}
th,td{text-align:left;padding:12px;vertical-align:top}
th{background:#214538;color:white}
td{border-top:1px solid var(--line)}
tr:nth-child(even){background:#f3f7f1}
.issue{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.issue-index{background:#e8f0e4;padding:5px 8px;border-radius:6px;align-self:start}
.sources summary{cursor:pointer;font-size:17px;font-weight:760;color:var(--ink)}
.source-group{display:grid;grid-template-columns:105px 1fr;gap:8px;padding:9px 0;border-top:1px solid var(--line);font-size:14px}
.source-group:first-of-type{margin-top:13px}
.source-group a{display:inline-block;text-decoration:underline;text-underline-offset:3px}
.sep{color:#677d70;padding:0 5px}
.disclaimer,.footer{color:var(--muted);font-size:13px}
.footer{text-align:center;padding:15px 20px 45px;overflow-wrap:anywhere}
.footer strong{font-size:17px;color:var(--ink)}
.back-top{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom));z-index:5;background:#183e30;color:white;width:46px;height:46px;display:grid;place-items:center;border-radius:50%;box-shadow:0 4px 16px #173a3433}
.back-top[hidden]{display:none}
@media(max-width:900px){.layout{grid-template-columns:170px minmax(0,1fr);gap:16px}.sidebar{padding:9px}.hero-inner{column-gap:22px}}
@media(max-width:740px){.hero-inner{grid-template-columns:1fr;gap:0;padding:43px 20px 33px}.layout{grid-template-columns:minmax(0,1fr);padding:16px 14px 8px;gap:16px}.sidebar{position:relative;top:auto;padding:10px}.nav-links{grid-template-columns:repeat(2,minmax(0,1fr))}.source-jump{margin-top:5px}.summary,.section,.sources{margin-bottom:15px}.metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.table-wrap::after{content:"左右滑动查看完整对比";position:sticky;left:0;display:block;padding:6px 10px;font-size:12px;color:var(--muted);background:#f2f7ef}}
@media(max-width:480px){.header-inner{padding-inline:14px}.brand-by{display:none}.header-right{gap:10px}.header-right a{font-size:13px}.summary-points{grid-template-columns:1fr;gap:7px}.summary-point{padding:10px 28px 10px 12px}.summary-point br{display:none}.summary-point small{margin-bottom:2px}.section-top{gap:12px}.section-icon{width:39px;height:39px}.section-icon svg{width:24px;height:24px}.source-group{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media print{body,.hero,.summary,.section,.sources{background:#fff;color:#172e27}.header,.sidebar,.progress,.back-top,.hero-cta,.table-wrap::after{display:none}.hero-inner,.layout{display:block;padding:0}.hero-desc,.meta,.meta a,.eyebrow{color:#294437}.hero{margin-bottom:18px}h1{font-size:34pt}.summary,.section,.sources{padding:14px}.section-top,.subhead{break-after:avoid}.metric,.issue,.take,tr{break-inside:avoid}.table-wrap{overflow:visible}table{min-width:0;font-size:9pt}th{color:#172e27;background:#e6eee2}}

/* Report cover and quick chapter navigation */
:root{--bg:#f4f4ec;--line:#dfe2d5;--lime:#e3f3a9}
.hero{background:radial-gradient(ellipse at 90% 95%,#305143,transparent 68%),#102b23}
.hero-inner{grid-template-columns:minmax(0,1fr);gap:0;padding-block:52px 56px}
.eyebrow{display:flex;align-items:center;flex-wrap:wrap;gap:7px 16px;letter-spacing:.14em}
.eyebrow span{font:11px ui-monospace,monospace;color:#c4d7ca}
.hero h1{font-size:clamp(28px,4.05vw,55px);letter-spacing:-.045em;line-height:1.2}
.hero h1>span{display:inline-block;font-size:clamp(64px,8.8vw,126px);font-family:Georgia,serif;font-weight:400;line-height:.98;letter-spacing:-.075em;margin-bottom:10px}
.title-period{color:var(--lime);padding-left:.05em}






.open-index{min-height:42px;border:0;background:none;color:white;padding:0 7px;font-size:14px}
.open-index:hover{text-decoration:underline;text-underline-offset:4px}
.chapter-dialog{color:var(--ink);width:min(460px,calc(100% - 28px));max-height:calc(100% - 36px);background:#fbfcf6;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 20px 80px #081c1660}
.chapter-dialog::backdrop{background:#0c211ab5;backdrop-filter:blur(4px)}
.chapter-dialog[open]{animation:menu-in .2s ease-out}
@keyframes menu-in{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:translateY(0)}}
.dialog-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.dialog-header h2{font-size:22px;margin:0}
.dialog-header button{width:44px;height:44px;border:1px solid var(--line);border-radius:50%;background:#edf2e8;color:var(--ink);font-size:24px;line-height:1}
.dialog-links{display:grid;gap:5px}
.dialog-links .nav-item{background:#f0f4ec;padding-inline:14px}
.dialog-links .nav-item:hover,.dialog-links .nav-item[aria-current]{background:#dcebd7}
.summary{background:#e9eedb;border-color:#d6e0c6}
.section{transition:border-color .25s,box-shadow .25s}
.section:target{border-color:#83a58c;box-shadow:0 0 0 3px #83a58c26}
.experience-path{list-style:none;padding:0;margin:14px 0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px}
.experience-path li{background:#f1f4eb;border-top:2px solid #9cb393;padding:10px;min-width:0;font-size:14px;border-radius:0 0 8px 8px}
.experience-path li span{display:block;color:var(--green);font:700 12px ui-monospace,monospace;margin-bottom:6px}
.experience-path li:nth-child(3){background:#e8f0cf;border-color:#76954f}
.field-note{border:1px solid #dce6cc;border-radius:11px;background:#f5f8ec;padding:14px 16px}
.field-note>span{display:block;font-size:13px;font-weight:800;color:var(--green);margin-bottom:4px}
.field-note p{margin:0}
@media(max-width:740px){.hero-inner{grid-template-columns:minmax(0,1fr);padding:35px 20px 28px}.experience-path{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:480px){.header-right{gap:6px}.header-right>a{display:none}.hero h1>span{font-size:clamp(57px,16vw,76px)}}
@media print{.hero{background:#fff;color:var(--ink)}.chapter-dialog{display:none}.title-period{color:var(--green)}.eyebrow span{color:var(--ink)}}

/* Field report */
:root{--bg:#f7f5ed;--paper:#fffdf7;--ink:#193129;--line:#d9dfd0;--width:1176px}
.hero{position:relative;isolation:isolate;overflow:hidden;background:#102a23}
.cover-light{position:absolute;z-index:-1;inset:0;pointer-events:none;background:radial-gradient(ellipse at 81% 83%,#3c6a4e 0,transparent 64%),repeating-linear-gradient(110deg,transparent 0 27px,#b7d89713 28px 29px,transparent 30px 45px);mask-image:linear-gradient(100deg,transparent 18%,#000 100%);animation:cover-light 1.7s ease-out both}
@keyframes cover-light{from{opacity:0;transform:translateX(22px)}to{opacity:1;transform:translateX(0)}}
.hero-inner{padding-block:64px 60px}
.hero h1>span{font-size:clamp(68px,11vw,152px);margin-bottom:8px;animation:cover-type .72s cubic-bezier(.2,.7,.25,1) both}
@keyframes cover-type{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.eyebrow{width:100%;padding-bottom:14px;border-bottom:1px solid #c6dfab40;justify-content:space-between}
.hero-cta{border-radius:3px}
.open-index{display:flex;align-items:center;gap:6px;white-space:nowrap}
.index-glyph{font-size:19px;line-height:1}
.sidebar{border:0;border-radius:0;background:transparent;padding-inline:0}
.side-label{border-bottom:1px solid var(--line);margin-bottom:7px}
.summary{border:0;border-radius:0;border-top:3px solid #496e52;background:#e9eedc}
.summary-label{display:flex;flex-wrap:wrap;gap:4px 12px}
.summary-label span{font:11px ui-monospace,monospace;align-self:center}
.summary-point{border-radius:4px}
.section{background:transparent;border:0;border-top:1px solid #b5c3af;border-radius:0;padding-inline:clamp(12px,2vw,28px);padding-top:30px}
.section:target{border-color:#4d8063;box-shadow:none}
.section-top{position:relative;border-color:#cbd5c5}
.section-top::after{content:"";position:absolute;bottom:-1px;left:0;width:60px;height:2px;background:#548565;transform-origin:left}
.section-top.heading-in-view::after{animation:chapter-line .65s cubic-bezier(.2,.8,.2,1) both}
@keyframes chapter-line{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.section-no{font-size:15px;font-weight:700;gap:9px}
.section-icon{border-radius:4px;background:#e3ebdd}
.chapter-turn{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;border-top:1px solid var(--line);padding-top:12px;margin-top:26px}
.chapter-turn a{display:block;min-height:48px;margin:0;padding:8px;border:0;border-radius:4px;font-size:14px;font-weight:700;transition:background .2s}
.chapter-turn a:hover{background:#e5eddf;text-decoration:none}
.chapter-turn small{display:block;color:var(--muted);font-size:12px;font-weight:500}
.chapter-next{grid-column:2;text-align:right}
@media(max-width:740px){.hero-inner{padding-block:32px 38px}.sidebar{padding-inline:3px}.section{padding-inline:7px}.chapter-dialog{margin:auto auto 0;width:100%;max-width:none;border-radius:16px 16px 0 0;padding-bottom:max(18px,env(safe-area-inset-bottom))}}
@media(max-width:480px){.hero h1>span{font-size:clamp(60px,17vw,81px)}}
@media print{.cover-light,.chapter-turn,.section-top::after{display:none}.hero-inner{padding:0}.hero h1>span{font-size:38pt}.section{padding-inline:0}}


/* Editorial refinement */
:root{--bg:#f5f4ec;--paper:#fffdf8;--ink:#172e27;--muted:#485e54;--green:#24664e;--line:#d5ddcf;--lime:#dff19f}
body{font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased}
.header{background:#102a23ed;border-color:#ffffff1c}
.header-inner{min-height:68px}
.brand-icon{border-radius:3px;background:var(--lime)}
.header-right{gap:20px}
.print{border-radius:3px;border-color:#789087;transition:background .2s,border-color .2s}
.print:hover{border-color:#dff19f}
.hero{min-height:500px;background:#102a23}
.hero-inner{position:relative;min-height:500px;align-content:center;padding-block:55px 68px}
.cover-light{background:radial-gradient(ellipse at 83% 55%,#52795780,transparent 55%),repeating-linear-gradient(115deg,transparent 0 35px,#c7e49b0c 36px 37px,transparent 38px 56px);mask-image:linear-gradient(90deg,transparent 10%,#000 100%)}
.eyebrow{max-width:100%;color:#dff19f}
.hero h1{position:relative;z-index:1;font-weight:700}
.hero h1>span{font-family:Newsreader,Georgia,serif;font-style:italic;letter-spacing:-.055em}
.hero-desc{font-size:16px;letter-spacing:.04em}
.meta{gap:6px 18px}
.hero-cta{margin-top:30px;padding:12px 17px;min-width:180px;justify-content:space-between}
.hero-cta span{transition:transform .2s}
.hero-cta:hover span{transform:translate(3px,3px)}
.cover-index{position:absolute;right:28px;bottom:68px;display:grid;grid-template-columns:auto auto;align-items:end;gap:4px 22px;color:#d8e8cc;font:10px/1.5 ui-monospace,monospace;letter-spacing:.12em;text-align:right}
.cover-index>span:first-child{grid-column:1 / -1;border-bottom:1px solid #b6d2ad70;padding-bottom:9px}
.cover-index strong{font:400 96px/.75 Newsreader,Georgia,serif;letter-spacing:-.08em;color:#dff19f}
.cover-index i{position:absolute;right:-50px;bottom:-105px;width:270px;height:270px;border:1px solid #cbe5b233;border-radius:50%;pointer-events:none}
.layout{padding-top:56px;gap:48px}
.sidebar{top:96px}
.side-label{padding-bottom:15px;color:#52695c}
.nav-item{border-radius:2px;transition:background .2s,color .2s,transform .2s}
.nav-item:hover{transform:translateX(3px)}
.nav-item[aria-current]{background:#e1ead9;box-shadow:inset 2px 0 #367657}
.summary{padding:clamp(24px,4vw,46px);background:#e6edd9;border-top:3px solid #426a4b}
.summary h2,.section h2{letter-spacing:-.025em}
.summary h2{max-width:18em;font-size:clamp(27px,3.4vw,39px);line-height:1.35;margin:16px 0}
.summary>p{max-width:42em;font-size:17px;line-height:1.85}
.summary-points{gap:0;border-top:1px solid #b8cbb1;margin-top:30px}
.summary-point{min-height:120px;border:0;border-right:1px solid #c6d6bd;border-radius:0;background:transparent;padding:18px 28px 10px 0}
.summary-point+ .summary-point{padding-left:18px}
.summary-point:last-child{border-right:0}
.summary-point:hover{transform:translateY(-3px);background:#ffffff38}
.point-arrow{top:17px;right:15px}
.section{padding-top:44px;padding-bottom:40px;margin-bottom:18px}
.section-top{gap:24px;padding-bottom:26px;margin-bottom:28px}
.section-no{font:500 16px JetBrains Mono,monospace}
.section-icon{width:48px;height:48px;background:#e4ecdf}
.section-tag{font:600 11px JetBrains Mono,monospace;letter-spacing:.13em}
.section h2{font-size:clamp(28px,3vw,38px);margin:6px 0 9px}
.section-lead{font-size:17px;line-height:1.7}
.section-body{max-width:760px}
.section-body p{line-height:1.9}
.subhead{margin-top:30px;font-size:18px;letter-spacing:.01em}
.chips span,.flow-step{border-radius:3px;background:#edf2e9}
.take,.focus-line,.formula{border-radius:0;background:#e8f0e3;border-left:3px solid #4d8160;padding:16px 20px}
.metric{border-radius:3px;background:#f0f4ec}
.table-wrap{border-radius:3px}
.issue-index{border-radius:2px}
.chapter-turn{margin-top:38px}
.chapter-turn a{border-radius:2px}
.sources{border-radius:3px;background:#f0f2e9}
.back-top{transition:transform .2s,background .2s}
.back-top:hover{transform:translateY(-3px);background:#2c6049;text-decoration:none}
@media(max-width:740px){.header-inner{min-height:60px}.hero,.hero-inner{min-height:0}.hero-inner{padding-block:42px 48px}.cover-index{right:20px;bottom:45px;opacity:.42}.cover-index strong{font-size:64px}.cover-index i{width:170px;height:170px}.layout{padding-top:20px}.summary-point{min-height:100px}.section{padding-top:32px}.section-top{gap:16px}}
@media(max-width:480px){.cover-index{display:none}.summary-point{min-height:0;border-right:0;border-bottom:1px solid #c6d6bd;padding:13px 30px 13px 0}.summary-point+ .summary-point{padding-left:0}.summary-point:last-child{border-bottom:0}.summary>p,.section-lead{font-size:16px}.summary-points{margin-top:20px}.point-arrow{top:13px}.header-right{gap:6px}}
@media print{.cover-index{display:none}.hero,.hero-inner{min-height:0}.layout{padding-top:0}.summary-point{min-height:0}.section{padding-top:14px;padding-bottom:14px}}