/* ============================================================
 * 《回声》— 暗灰蓝基底，琥珀金=环境声，青绿=玩家声。彩色只属于声音。
 * 美术升级：全部程序化（多层渐变 / 同心声波环 / 微粒 / 体积光 / 辉光边），零外部资源。
 * 基调仍是「暗夜里有微光」，不是亮色页。
 * ============================================================ */
:root{
  --bg:#0b111a; --base:#2A3B4C; --base2:#1a2734;
  --amber:#F5A623; --teal:#43C6AC; --orange:#ff8a3d;
  --ink:#c9d6e2; --dim:#6b7c8d;
  --deep0:#05080e; --deep1:#0a121c; --deep2:#0d1a26; --deep3:#102534;
  --edge:rgba(150,198,226,.20);
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{width:100%;height:100%;overflow:hidden;background:var(--bg);font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink)}
#game{position:fixed;inset:0;width:100%;height:100%;display:block;touch-action:none}

/* ---------- 界面层 ---------- */
#ui{position:fixed;inset:0;pointer-events:none}

/* ---------- 深空氛围层（菜单专用；游戏进行中隐藏，避免盖住 canvas） ----------
   .amb-glow  : 5 段深空渐变（天顶冷 → 地平线暖）
   .amb-ring  : 3 组缓慢扩散的声波同心环
   .amb-beam  : 微弱体积光
   .amb-dust  : 漂浮微粒（多层点阵，纯 CSS 生成）                                */
.ambience{position:absolute;inset:0;z-index:0;overflow:hidden;pointer-events:none;
  opacity:0;visibility:hidden;transition:opacity .7s ease,visibility .7s ease}
#ui.ambient .ambience{opacity:1;visibility:visible}
.ambience>span{position:absolute;display:block;pointer-events:none}
.amb-glow{inset:0;
  background:
    radial-gradient(126% 82% at 50% 118%, rgba(67,198,172,.15) 0%, rgba(67,198,172,.05) 32%, rgba(67,198,172,0) 62%),
    radial-gradient(66% 54% at 15% 4%, rgba(245,166,35,.11) 0%, rgba(245,166,35,0) 64%),
    radial-gradient(58% 58% at 88% 16%, rgba(125,214,255,.08) 0%, rgba(125,214,255,0) 70%),
    radial-gradient(80% 60% at 50% 46%, rgba(63,110,150,.10) 0%, rgba(63,110,150,0) 72%),
    linear-gradient(184deg,#05080e 0%,#0a121c 24%,#0c1824 54%,#0b1a22 78%,#071016 100%)}
.amb-ring{left:50%;top:50%;width:190vmax;height:190vmax;margin:-95vmax 0 0 -95vmax;border-radius:50%;
  transform-origin:50% 50%;will-change:transform,opacity}
.amb-ring.r1{background:repeating-radial-gradient(circle at 50% 50%, rgba(67,198,172,.085) 0 1.2px, rgba(67,198,172,0) 1.2px 46px);animation:echoRipple 11s linear infinite}
.amb-ring.r2{background:repeating-radial-gradient(circle at 50% 50%, rgba(245,166,35,.062) 0 1px, rgba(245,166,35,0) 1px 93px);animation:echoRipple 11s 3.66s linear infinite}
.amb-ring.r3{background:repeating-radial-gradient(circle at 50% 50%, rgba(125,214,255,.055) 0 1px, rgba(125,214,255,0) 1px 149px);animation:echoRipple 11s 7.33s linear infinite}
@keyframes echoRipple{0%{transform:scale(.30);opacity:0}14%{opacity:.9}72%{opacity:.32}100%{transform:scale(1.02);opacity:0}}
.amb-beam{inset:-32% -14%;transform:rotate(-14deg);
  background:linear-gradient(100deg, rgba(125,214,255,0) 34%, rgba(168,229,255,.065) 50%, rgba(125,214,255,0) 66%);
  animation:beamDrift 17s ease-in-out infinite alternate}
@keyframes beamDrift{from{transform:rotate(-14deg) translateX(-5%)}to{transform:rotate(-9deg) translateX(6%)}}
.amb-dust{inset:-14%;opacity:.62;
  background-image:
    radial-gradient(circle, rgba(206,236,255,.60) 0 .7px, rgba(206,236,255,0) 1.7px),
    radial-gradient(circle, rgba(67,198,172,.55) 0 .6px, rgba(67,198,172,0) 1.5px),
    radial-gradient(circle, rgba(245,166,35,.45) 0 .5px, rgba(245,166,35,0) 1.4px),
    radial-gradient(circle, rgba(206,236,255,.32) 0 .9px, rgba(206,236,255,0) 2.1px);
  background-size:118px 156px,187px 231px,241px 173px,293px 271px;
  background-position:0 0,73px 41px,151px 97px,37px 203px;
  animation:dustFloat 27s ease-in-out infinite alternate}
@keyframes dustFloat{from{transform:translate3d(0,0,0)}to{transform:translate3d(-34px,-58px,0)}}

.screen{position:absolute;inset:0;z-index:1;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden;
  opacity:0;transform:scale(1.04);transition:opacity .4s ease,transform .4s ease;pointer-events:none;
  background:linear-gradient(184deg,rgba(6,10,16,.50) 0%,rgba(7,12,19,.60) 52%,rgba(5,9,14,.68) 100%);
  visibility:hidden}
.screen.show{opacity:1;transform:scale(1);pointer-events:auto;visibility:visible}
/* 关键修复：未显示的界面绝不能拦截点击，否则隐藏主菜单里的按钮会挡住启动页，导致点「开始」毫无反应、根本进不去游戏 */
.screen:not(.show),.screen:not(.show) *{pointer-events:none!important}
.screen:not(.show){visibility:hidden}
.screen.modal{background:rgba(5,8,13,.72);backdrop-filter:blur(7px);-webkit-backdrop-filter:blur(7px)}

/* 渐变发光标题 */
h1.title{font-weight:200;letter-spacing:.9em;margin:14px 0 6px;text-indent:.9em;font-size:34px;
  background:linear-gradient(178deg,#f4fcff 0%,#b6efe3 38%,#43C6AC 72%,#1c7d6c 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 18px rgba(67,198,172,.42),0 0 46px rgba(67,198,172,.22);
  animation:titleIn 1.2s cubic-bezier(.22,.9,.28,1) both}
@keyframes titleIn{from{opacity:0;letter-spacing:1.4em;transform:translateY(10px)}to{opacity:1;letter-spacing:.9em;transform:none}}
h2{font-weight:300;letter-spacing:.4em;font-size:18px;
  background:linear-gradient(180deg,#e9f6ff 0%,#9fd9cf 55%,#4fae9c 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 14px rgba(67,198,172,.30)}

/* 声波 logo（多层同心环 + 辉光） */
.ring-logo{position:relative;width:120px;height:120px;display:grid;place-items:center;
  filter:drop-shadow(0 0 14px rgba(67,198,172,.35)) drop-shadow(0 0 34px rgba(67,198,172,.18))}
.ring-logo i,.ring-logo b{position:absolute;border-radius:50%;border:2px solid var(--teal)}
.ring-logo i:nth-child(1){inset:0;opacity:.9;animation:pulse 2.4s ease-out infinite;border-color:rgba(67,198,172,.85)}
.ring-logo i:nth-child(2){inset:18px;border-color:var(--amber);opacity:.75;animation:pulse 2.4s .4s ease-out infinite}
.ring-logo i:nth-child(3){inset:36px;opacity:.6;animation:pulse 2.4s .8s ease-out infinite;border-color:rgba(190,240,232,.8)}
.ring-logo b{width:14px;height:14px;inset:auto;border:none;
  background:radial-gradient(circle at 36% 32%,#ffffff 0%,#7fe3d1 38%,var(--teal) 100%);
  box-shadow:0 0 18px var(--teal),0 0 42px rgba(67,198,172,.55)}
.ring-logo.small{width:76px;height:76px}
.ring-logo.small b{width:10px;height:10px}
@keyframes pulse{0%{transform:scale(.55);opacity:0}35%{opacity:.85}100%{transform:scale(1.25);opacity:0}}

.boot-line{margin-top:26px;font-size:15px;letter-spacing:.35em;color:#dceaf5;
  text-shadow:0 0 14px rgba(160,215,255,.35);animation:breath 3s ease-in-out infinite}
.boot-sub{margin-top:10px;font-size:12px;letter-spacing:.3em;color:#8fa6b8}
@keyframes breath{0%,100%{opacity:.45}50%{opacity:1}}

/* 菜单按钮：渐变底 + 内高光 + 亮边 + hover 声波扩散 */
.menu-list{display:flex;flex-direction:column;gap:12px;margin-top:22px;min-width:220px}
.menu-list.row{flex-direction:row;gap:10px;margin-top:18px}
.menu-list button{pointer-events:auto;cursor:pointer;position:relative;overflow:hidden;
  color:#dce9f3;padding:12px 26px;border-radius:999px;font-size:15px;letter-spacing:.35em;text-indent:.35em;
  border:1px solid var(--edge);
  background:
    radial-gradient(86% 132% at 50% -38%, rgba(226,246,255,.15), rgba(226,246,255,0) 62%),
    linear-gradient(180deg, rgba(64,95,122,.44) 0%, rgba(26,43,59,.56) 48%, rgba(11,18,27,.70) 100%);
  box-shadow:inset 0 1px 0 rgba(214,240,255,.15), inset 0 -10px 20px rgba(0,0,0,.38), 0 6px 16px rgba(0,0,0,.44);
  transition:color .25s,border-color .25s,box-shadow .25s,transform .25s,background .25s}
.menu-list button::after{content:"";position:absolute;left:50%;top:50%;width:150%;aspect-ratio:1/1;
  transform:translate(-50%,-50%) scale(.15);border-radius:50%;border:1px solid rgba(67,198,172,.6);
  opacity:0;pointer-events:none}
.menu-list button:hover,.menu-list button:focus-visible{
  color:#fff;border-color:rgba(67,198,172,.78);
  background:
    radial-gradient(86% 132% at 50% -38%, rgba(232,255,251,.24), rgba(232,255,251,0) 64%),
    linear-gradient(180deg, rgba(78,142,144,.48) 0%, rgba(28,62,72,.62) 50%, rgba(9,24,30,.74) 100%);
  box-shadow:inset 0 1px 0 rgba(230,255,252,.24), inset 0 -10px 22px rgba(0,0,0,.34),
    0 0 0 1px rgba(67,198,172,.20), 0 8px 26px rgba(0,0,0,.5), 0 0 26px rgba(67,198,172,.30);
  outline:none;transform:translateY(-1px)}
.menu-list button:hover::after,.menu-list button:focus-visible::after{animation:btnPing 1.25s ease-out infinite}
@keyframes btnPing{0%{transform:translate(-50%,-50%) scale(.15);opacity:.85}100%{transform:translate(-50%,-50%) scale(1.05);opacity:0}}
.menu-list button:disabled{opacity:.3;cursor:default;box-shadow:none}
.lv-tag{position:absolute;bottom:26px;font-size:12px;letter-spacing:.4em;color:var(--dim);
  text-shadow:0 0 10px rgba(67,198,172,.35)}

/* 章节卡片 */
.scr-head{position:absolute;top:0;left:0;right:0;display:flex;align-items:center;gap:16px;padding:20px 26px;z-index:2}
.scr-head h2{flex:1;text-align:center;margin-right:56px}
.back{pointer-events:auto;width:40px;height:40px;border-radius:50%;cursor:pointer;position:relative;
  border:1px solid var(--edge);
  background:radial-gradient(90% 120% at 40% 20%, rgba(226,246,255,.13), rgba(226,246,255,0) 66%),linear-gradient(180deg,rgba(48,72,94,.55),rgba(10,17,25,.7));
  box-shadow:inset 0 1px 0 rgba(214,240,255,.16), 0 5px 14px rgba(0,0,0,.4);transition:all .22s}
.back:hover{border-color:rgba(67,198,172,.7);box-shadow:inset 0 1px 0 rgba(214,240,255,.22),0 0 20px rgba(67,198,172,.3)}
.back::before{content:"";position:absolute;left:15px;top:12px;width:11px;height:11px;border-left:2px solid var(--ink);border-bottom:2px solid var(--ink);transform:rotate(45deg)}
.chapter-grid{display:flex;gap:18px;flex-wrap:wrap;justify-content:center;max-width:900px;padding:70px 20px 20px}
.ch-card{pointer-events:auto;cursor:pointer;position:relative;overflow:hidden;width:190px;padding:22px 16px;border-radius:16px;transition:all .3s;text-align:center;
  border:1px solid rgba(150,198,226,.14);
  background:
    radial-gradient(120% 92% at 50% -22%, rgba(67,198,172,.12), rgba(67,198,172,0) 62%),
    radial-gradient(90% 70% at 18% 110%, rgba(245,166,35,.07), rgba(245,166,35,0) 66%),
    linear-gradient(160deg,#22303f 0%,#16222e 48%,#0c141d 100%);
  box-shadow:inset 0 1px 0 rgba(214,240,255,.11), inset 0 -20px 34px rgba(0,0,0,.36), 0 10px 26px rgba(0,0,0,.46)}
.ch-card::after{content:"";position:absolute;left:12%;right:12%;bottom:0;height:1px;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(67,198,172,.7),transparent);opacity:.55}
.ch-card:hover:not(.lock){border-color:rgba(67,198,172,.62);transform:translateY(-6px) scale(1.02);
  box-shadow:inset 0 1px 0 rgba(214,240,255,.20), inset 0 -20px 34px rgba(0,0,0,.32),
    0 18px 40px rgba(0,0,0,.55), 0 0 32px rgba(67,198,172,.24)}
.ch-card.lock{opacity:.35;cursor:default}
.ch-card .ch-num{font-size:30px;font-weight:200;letter-spacing:.2em;
  background:linear-gradient(180deg,#f3fbff 0%,#a9dbe6 52%,#4f9aa8 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 16px rgba(120,200,220,.35)}
.ch-card .ch-bars{display:flex;gap:4px;justify-content:center;margin-top:14px}
.ch-card .ch-bars i{width:16px;height:5px;border-radius:3px;background:rgba(201,214,226,.15);box-shadow:inset 0 1px 0 rgba(255,255,255,.08)}
.ch-card .ch-bars i.done{background:linear-gradient(180deg,#7fe3d1,#2f9c88);box-shadow:0 0 8px rgba(67,198,172,.6)}
.ch-card .ch-bars i.gold{background:linear-gradient(180deg,#ffd27d,#e08a12);box-shadow:0 0 9px rgba(245,166,35,.7)}
.ch-card .ch-frag{margin-top:12px;font-size:12px;color:var(--dim);letter-spacing:.2em}

.level-grid{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;align-content:center;padding:70px 20px 20px;max-width:860px}
.lv-node{pointer-events:auto;cursor:pointer;position:relative;overflow:hidden;width:118px;height:118px;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;transition:all .3s;
  border:1px solid rgba(150,198,226,.16);
  background:
    radial-gradient(80% 70% at 34% 24%, rgba(126,186,212,.24), rgba(126,186,212,0) 62%),
    radial-gradient(104% 104% at 50% 122%, rgba(67,198,172,.16), rgba(67,198,172,0) 62%),
    linear-gradient(160deg,#27343f 0%,#16222e 52%,#0b121a 100%);
  box-shadow:inset 0 1px 0 rgba(214,240,255,.14), inset 0 -16px 28px rgba(0,0,0,.42), 0 10px 24px rgba(0,0,0,.44)}
.lv-node::before{content:"";position:absolute;inset:8px;border-radius:50%;border:1px dashed rgba(150,198,226,.16);pointer-events:none}
.lv-node:hover:not(.lock){border-color:rgba(67,198,172,.7);transform:translateY(-5px) scale(1.05);
  box-shadow:inset 0 1px 0 rgba(214,240,255,.22), inset 0 -16px 28px rgba(0,0,0,.36), 0 16px 34px rgba(0,0,0,.55), 0 0 30px rgba(67,198,172,.32)}
.lv-node.lock{opacity:.3;cursor:default}
.lv-node .num{font-size:26px;font-weight:200;
  background:linear-gradient(180deg,#f6fcff 0%,#b8d9e6 55%,#5d90a4 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:0 0 14px rgba(130,200,225,.32)}
.lv-node .rate{font-size:15px;font-weight:600;letter-spacing:.1em}
/* 评级颜色见文末「结算弹窗」段（同一批 .rate.rX 规则） */
.lv-node .dots{display:flex;gap:4px}
.lv-node .dots i{width:6px;height:6px;border-radius:50%;background:rgba(201,214,226,.18)}
.lv-node .dots i.on{background:linear-gradient(180deg,#ffd98f,#e08a12);box-shadow:0 0 7px var(--amber),0 0 14px rgba(245,166,35,.5)}

/* 操作说明 */
.ctl-cols{display:flex;gap:34px;flex-wrap:wrap;justify-content:center;padding:70px 26px 26px;max-width:760px}
.ctl-col{min-width:240px;padding:16px 18px;border-radius:16px;
  background:linear-gradient(165deg,rgba(34,48,63,.72),rgba(11,18,26,.72));
  border:1px solid rgba(150,198,226,.12);
  box-shadow:inset 0 1px 0 rgba(214,240,255,.10), 0 12px 28px rgba(0,0,0,.42)}
.ctl-col h3{font-size:13px;letter-spacing:.4em;color:var(--teal);margin-bottom:14px;font-weight:400;text-shadow:0 0 12px rgba(67,198,172,.45)}
.ctl-col dl{display:grid;grid-template-columns:auto 1fr;gap:9px 16px;font-size:14px}
.ctl-col dt{color:#e8f1f8;font-weight:600;letter-spacing:.1em}
.ctl-col dd{color:var(--dim)}

/* 设置 */
.set-body{display:flex;flex-direction:column;gap:16px;width:min(480px,88vw);padding:70px 22px 26px;border-radius:20px;
  background:linear-gradient(168deg,rgba(35,49,64,.66),rgba(10,17,25,.74));
  border:1px solid rgba(150,198,226,.12);
  box-shadow:inset 0 1px 0 rgba(214,240,255,.10), 0 16px 38px rgba(0,0,0,.46)}
.set-row{display:flex;align-items:center;gap:14px;font-size:14px;letter-spacing:.2em}
.set-row label{width:96px;color:var(--ink)}
.set-row input[type=range]{flex:1;appearance:none;-webkit-appearance:none;height:5px;border-radius:3px;pointer-events:auto;cursor:pointer;
  background:linear-gradient(90deg,rgba(67,198,172,.45),rgba(120,170,205,.30) 55%,rgba(201,214,226,.16));
  box-shadow:inset 0 1px 2px rgba(0,0,0,.5)}
.set-row input[type=range]::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:16px;height:16px;border-radius:50%;cursor:pointer;
  background:radial-gradient(circle at 34% 30%,#ffffff,#7fe3d1 42%,var(--teal));
  box-shadow:0 0 10px rgba(67,198,172,.7),0 0 22px rgba(67,198,172,.35)}
.set-row input[type=range]::-moz-range-thumb{width:16px;height:16px;border:none;border-radius:50%;background:var(--teal);box-shadow:0 0 10px rgba(67,198,172,.7)}
.set-val{width:56px;text-align:right;color:var(--dim);font-size:12px}
.switch{pointer-events:auto;margin-left:auto;width:46px;height:24px;border-radius:12px;cursor:pointer;position:relative;transition:all .25s;
  border:1px solid var(--edge);background:linear-gradient(180deg,rgba(30,44,58,.7),rgba(9,15,22,.8));
  box-shadow:inset 0 1px 0 rgba(214,240,255,.10), inset 0 3px 8px rgba(0,0,0,.45)}
.switch::after{content:"";position:absolute;top:3px;left:4px;width:16px;height:16px;border-radius:50%;background:linear-gradient(180deg,#9fb3c4,#5d7285);transition:all .25s;box-shadow:0 1px 3px rgba(0,0,0,.6)}
.switch.on{border-color:rgba(67,198,172,.65);background:linear-gradient(180deg,rgba(40,92,88,.75),rgba(9,26,26,.85))}
.switch.on::after{left:24px;background:radial-gradient(circle at 34% 30%,#fff,#6fdfc9 45%,var(--teal));box-shadow:0 0 9px var(--teal),0 0 18px rgba(67,198,172,.5)}
/* 三档分段选择（视觉辅助：关/基础/完整） */
.seg-ctl{margin-left:auto;display:flex;border:1px solid var(--edge);border-radius:999px;overflow:hidden;
  background:linear-gradient(180deg,rgba(30,44,58,.7),rgba(9,15,22,.8));
  box-shadow:inset 0 1px 0 rgba(214,240,255,.10), inset 0 3px 8px rgba(0,0,0,.45)}
.seg-ctl button{pointer-events:auto;cursor:pointer;border:none;background:transparent;color:var(--dim);
  padding:5px 14px;font-size:12px;letter-spacing:.14em;text-indent:.14em;font-family:inherit;transition:all .22s}
.seg-ctl button+button{border-left:1px solid rgba(150,198,226,.14)}
.seg-ctl button.on{color:#08131a;background:linear-gradient(180deg,#8beadb,var(--teal));
  text-shadow:none;box-shadow:0 0 12px rgba(67,198,172,.5), inset 0 1px 0 rgba(255,255,255,.4)}
.theme-dots{margin-left:auto;display:flex;gap:10px}
.theme-dots button{pointer-events:auto;width:22px;height:22px;border-radius:50%;border:2px solid transparent;cursor:pointer;transition:all .2s;box-shadow:0 0 10px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.35)}
.theme-dots button.on{border-color:#fff;transform:scale(1.15);box-shadow:0 0 14px rgba(255,255,255,.55)}
.theme-dots button.lock{opacity:.25;cursor:default}
.set-foot{margin-top:8px;display:flex;flex-direction:column;align-items:center;gap:8px}
.ghost-btn{pointer-events:auto;cursor:pointer;color:var(--dim);padding:10px 22px;border-radius:999px;font-size:13px;letter-spacing:.3em;text-indent:.3em;transition:all .25s;
  border:1px solid var(--edge);
  background:radial-gradient(90% 130% at 50% -40%, rgba(226,246,255,.12), rgba(226,246,255,0) 62%),linear-gradient(180deg,rgba(46,68,88,.42),rgba(10,17,25,.66));
  box-shadow:inset 0 1px 0 rgba(214,240,255,.12), 0 5px 14px rgba(0,0,0,.38)}
.ghost-btn:hover{border-color:rgba(255,138,61,.65);color:var(--orange);
  box-shadow:inset 0 1px 0 rgba(255,226,200,.2),0 0 20px rgba(255,138,61,.28),0 5px 14px rgba(0,0,0,.38)}
.reset-hint{font-size:11px;color:var(--orange);opacity:0;transition:opacity .3s;letter-spacing:.2em;text-shadow:0 0 12px rgba(255,138,61,.6)}
.reset-hint.show{opacity:1}

/* 成就 */
.ach-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;width:min(760px,92vw);padding:70px 0 26px;max-height:72vh;overflow:auto}
.ach-card{position:relative;overflow:hidden;padding:16px;border-radius:14px;transition:all .28s;
  border:1px solid rgba(150,198,226,.10);
  background:linear-gradient(160deg,rgba(34,48,62,.8) 0%,rgba(18,27,38,.85) 55%,rgba(10,16,24,.9) 100%);
  box-shadow:inset 0 1px 0 rgba(214,240,255,.09), 0 8px 20px rgba(0,0,0,.4)}
.ach-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(180deg,rgba(150,198,226,.35),rgba(150,198,226,.05))}
.ach-card.got{border-color:rgba(245,166,35,.42);
  background:linear-gradient(160deg,rgba(64,50,30,.62) 0%,rgba(30,24,18,.8) 55%,rgba(14,11,9,.88) 100%);
  box-shadow:inset 0 1px 0 rgba(255,226,180,.18), 0 0 22px rgba(245,166,35,.16), 0 8px 20px rgba(0,0,0,.4)}
.ach-card.got::before{background:linear-gradient(180deg,#ffd27d,rgba(245,166,35,.2));box-shadow:0 0 12px rgba(245,166,35,.55)}
.ach-card h4{font-size:15px;font-weight:500;letter-spacing:.2em;color:var(--ink)}
.ach-card.got h4{color:var(--amber);text-shadow:0 0 12px rgba(245,166,35,.5)}
.ach-card p{margin-top:8px;font-size:12px;color:var(--dim);line-height:1.7}
.ach-card.locked{opacity:.55}
.ach-card:hover{transform:translateY(-3px);border-color:rgba(67,198,172,.5);box-shadow:inset 0 1px 0 rgba(214,240,255,.16),0 14px 30px rgba(0,0,0,.5),0 0 24px rgba(67,198,172,.18)}
.ach-card.got:hover{border-color:rgba(245,166,35,.7)}

/* 弹窗 */
.modal-box{position:relative;text-align:center;max-width:92vw;padding:34px 40px;border-radius:22px;
  border:1px solid rgba(150,198,226,.16);
  background:
    radial-gradient(120% 80% at 50% -14%, rgba(67,198,172,.13), rgba(67,198,172,0) 60%),
    radial-gradient(90% 70% at 50% 118%, rgba(245,166,35,.09), rgba(245,166,35,0) 62%),
    linear-gradient(165deg,#16222f 0%,#101a25 48%,#0a121a 100%);
  box-shadow:inset 0 1px 0 rgba(214,240,255,.14), 0 30px 80px rgba(0,0,0,.65), 0 0 40px rgba(67,198,172,.10);
  animation:modalIn .42s cubic-bezier(.2,.9,.3,1) both}
@keyframes modalIn{from{opacity:0;transform:translateY(14px) scale(.96)}to{opacity:1;transform:none}}
.modal-box h2{margin-bottom:8px}
.rate{font-size:64px;font-weight:200;line-height:1;
  background:linear-gradient(180deg,#ffffff 0%,#ffe3b0 45%,#F5A623 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 24px rgba(245,166,35,.5),0 0 60px rgba(245,166,35,.25);
  animation:rateIn .55s cubic-bezier(.2,1.5,.4,1) both}
@keyframes rateIn{from{opacity:0;transform:scale(.6)}to{opacity:1;transform:none}}
/* 结算大字母：按评级换渐变 + 辉光（只改表现） */
.rate.rS{color:transparent;background:linear-gradient(180deg,#ffffff 0%,#ffe3b0 45%,#F5A623 100%);-webkit-background-clip:text;background-clip:text;
  text-shadow:0 0 26px rgba(245,166,35,.55),0 0 64px rgba(245,166,35,.28)}
.rate.rA{color:transparent;background:linear-gradient(180deg,#f2fffb 0%,#9de8d8 46%,#43C6AC 100%);-webkit-background-clip:text;background-clip:text;
  text-shadow:0 0 26px rgba(67,198,172,.55),0 0 64px rgba(67,198,172,.26)}
.rate.rB{color:transparent;background:linear-gradient(180deg,#f4fbff 0%,#a8cbe4 48%,#6f9cbe 100%);-webkit-background-clip:text;background-clip:text;
  text-shadow:0 0 24px rgba(127,166,201,.5)}
.rate.rC{color:transparent;background:linear-gradient(180deg,#dfe8f0 0%,#9aabbb 50%,#6b7c8d 100%);-webkit-background-clip:text;background-clip:text;
  text-shadow:0 0 18px rgba(150,170,190,.35)}
.frag-row{display:flex;gap:10px;justify-content:center;margin:16px 0 6px}
.frag-row i{width:12px;height:12px;transform:rotate(45deg);background:rgba(201,214,226,.15);border-radius:2px}
.frag-row i.on{background:linear-gradient(135deg,#ffe6b4,#e08a12);box-shadow:0 0 12px var(--amber),0 0 26px rgba(245,166,35,.5)}
.stat-row{display:flex;gap:30px;justify-content:center;margin:6px 0 4px}
.stat{display:flex;align-items:center;gap:8px;color:var(--dim)}
.stat svg{width:18px;height:18px;filter:drop-shadow(0 0 6px rgba(67,198,172,.45))}
.stat b{color:var(--ink);font-weight:500;font-size:15px}

/* 序章 / 终章 */
.intro-box,.ending-box{text-align:center}
.intro-l1{font-size:22px;letter-spacing:.5em;text-indent:.5em;font-weight:300;opacity:0;animation:fadeUp 1.6s .3s forwards;
  background:linear-gradient(180deg,#f4fcff 0%,#bcd8e6 60%,#7fa6b9 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 20px rgba(120,190,220,.35)}
.intro-l2{margin-top:22px;font-size:15px;letter-spacing:.45em;text-indent:.45em;color:var(--teal);opacity:0;animation:fadeUp 1.6s 1.4s forwards;
  text-shadow:0 0 18px rgba(67,198,172,.55),0 0 40px rgba(67,198,172,.28)}
.end-l{font-size:24px;letter-spacing:.5em;text-indent:.5em;font-weight:300;opacity:0;animation:fadeUp 1.8s .3s forwards;
  background:linear-gradient(180deg,#fff6e4 0%,#ffdda6 55%,#e0a24a 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 22px rgba(245,166,35,.45)}
.end-l+.end-l{margin-top:18px;animation-delay:1.5s}
.end-s{margin-top:30px;font-size:13px;letter-spacing:.35em;color:#93a8b8;opacity:0;animation:fadeUp 1.8s 3s forwards}
.intro-box+.ghost-btn,.ending-box+.ghost-btn{margin-top:46px;opacity:0;animation:fadeUp 1s 2.4s forwards}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* 浮动提示 */
#toast{position:absolute;z-index:5;top:22px;left:50%;transform:translate(-50%,-8px);display:flex;flex-direction:column;gap:8px;align-items:center;opacity:0;transition:all .35s}
#toast.show{opacity:1;transform:translate(-50%,0)}
.toast-item{background:linear-gradient(180deg,rgba(38,30,16,.94),rgba(16,24,34,.94));border:1px solid rgba(245,166,35,.5);border-radius:999px;padding:9px 22px;font-size:13px;letter-spacing:.25em;color:#ffe9c4;
  box-shadow:inset 0 1px 0 rgba(255,226,180,.22), 0 8px 22px rgba(0,0,0,.5), 0 0 22px rgba(245,166,35,.22)}

/* ---------- 游戏说明 ---------- */
.guide-body{width:min(680px,92vw);max-height:76vh;overflow:auto;padding:70px 4px 26px;display:flex;flex-direction:column;gap:13px;pointer-events:auto}
.guide-sec{position:relative;overflow:hidden;padding:14px 18px;border-radius:14px;
  border:1px solid rgba(150,198,226,.10);
  background:linear-gradient(160deg,rgba(36,51,66,.8) 0%,rgba(18,27,38,.86) 55%,rgba(10,16,24,.9) 100%);
  box-shadow:inset 0 1px 0 rgba(214,240,255,.09), 0 8px 20px rgba(0,0,0,.4)}
.guide-sec::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,rgba(67,198,172,.7),rgba(67,198,172,.05))}
.guide-sec h3{font-size:14px;letter-spacing:.3em;color:var(--teal);font-weight:500;display:flex;align-items:center;gap:9px;text-shadow:0 0 12px rgba(67,198,172,.4)}
.g-ic{font-style:normal;font-size:16px}
.guide-sec p{margin-top:9px;font-size:13px;line-height:2;color:var(--ink);letter-spacing:.05em}
.guide-sec b{color:var(--amber);font-weight:500;text-shadow:0 0 10px rgba(245,166,35,.4)}
.guide-foot{text-align:center;padding:4px 0 2px}

@media (max-width:640px){
  h1.title{font-size:26px}
  .menu-list button{padding:10px 18px;font-size:14px}
  .modal-box{padding:26px 22px}
  .chapter-grid{gap:12px}.ch-card{width:150px;padding:16px 10px}
  .lv-node{width:96px;height:96px}
  .set-body{padding:64px 14px 20px}
  .amb-ring{width:260vmax;height:260vmax;margin:-130vmax 0 0 -130vmax}
}

/* ---------- 点击响应优化 ---------- */
button{touch-action:manipulation;font-family:inherit}
#ui{user-select:none;-webkit-user-select:none}
.menu-list button:active,.ghost-btn:active,.back:active,.switch:active{transform:scale(.94)}
.ch-card:active:not(.lock){transform:scale(.97)}
.lv-node:active:not(.lock){transform:scale(.95)}

/* 无障碍：尊重「减少动态效果」 */
@media (prefers-reduced-motion:reduce){
  .amb-ring,.amb-beam,.amb-dust{animation:none}
  .amb-ring{opacity:.45}
}