/* ============================================================
   烛心站点 · 动态星空 v4（纯 CSS 方案）
   为什么换：Canvas 在部分设备上合成异常导致不可见
   CSS 方案优点：普通 DOM，所有浏览器都渲染；GPU 合成；带真实动画
   ============================================================ */

/* ---------- 深空底 ---------- */
/* html 兜底深色（防止滚动到底露出白底）；星空层是 fixed 独立层，不受影响 */
html {
  background: #05060a !important;
  background-image: none !important;
  min-height: 100%;
}
body {
  background: transparent !important;
  background-image: none !important;
  min-height: 100vh;
}

/* 额外兜底：页面最底部不留白 */
body::after {
  content: '';
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: #05060a;
  z-index: 1;
  pointer-events: none;
}
.deep-space {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 130% 85% at 50% -12%, #131b33 0%, #0a0e18 46%, #05060a 100%);
}

/* ---------- 三层星空容器 ---------- */
.stars-layer {
  position: fixed;
  inset: -50%;
  z-index: 1;
  pointer-events: none;
  will-change: transform;
}

/* 星星本体：一个点 + 多层 box-shadow 复制出大量星星 */
.stars-layer i {
  position: absolute;
  display: block;
  border-radius: 50%;
  background: transparent;
  transform: translateZ(0);
}

/* 第 1 层：远处细密星尘（最多、最暗、最慢） */
.stars-a {
  width: 1px; height: 1px;
  box-shadow:
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    678px 811px #ffe9c4,
    270px 532px #ffe9c4,
    641px 995px #ffe9c4,
    746px 1002px #cfe0ff,
    1107px 945px #ffe9c4,
    223px 255px #fff,
    -113px 578px #fff5d8,
    -207px 678px #fff5d8,
    1306px 982px #fff,
    34px 463px #cfe0ff,
    -130px 467px #e8f0ff,
    644px -38px #e8f0ff,
    295px 313px #e8f0ff,
    872px -12px #fff,
    854px 411px #e8f0ff,
    301px 1028px #fff,
    861px 942px #fff,
    -157px 66px #e8f0ff,
    -37px -99px #fff,
    683px 862px #fff,
    60px -133px #cfe0ff,
    -54px 85px #fff5d8,
    -1px 446px #fff,
    533px 187px #fff,
    1172px -41px #e8f0ff,
    1152px 22px #e8f0ff,
    1205px 1049px #e8f0ff,
    260px 729px #cfe0ff,
    -1px 463px #cfe0ff,
    -145px 709px #ffe9c4,
    -36px 895px #fff5d8,
    -286px 643px #fff5d8,
    -9px 672px #e8f0ff,
    847px 1071px #fff5d8,
    -166px -81px #fff,
    1057px 495px #fff,
    511px 882px #fff,
    69px 895px #fff,
    1316px 454px #cfe0ff,
    178px 950px #fff,
    282px 538px #fff5d8,
    -145px 257px #fff5d8,
    374px -165px #fff,
    347px -90px #e8f0ff,
    103px 245px #fff,
    147px -122px #e8f0ff,
    818px 200px #cfe0ff,
    101px 780px #ffe9c4,
    376px 660px #fff,
    1135px 765px #ffe9c4,
    527px 882px #fff5d8,
    466px 950px #fff5d8,
    912px 618px #fff,
    -43px 1097px #e8f0ff,
    458px 129px #cfe0ff,
    598px 406px #fff5d8,
    388px 936px #fff,
    -11px 3px #e8f0ff,
    280px 250px #fff5d8,
    561px 572px #e8f0ff,
    224px -80px #ffe9c4,
    -154px 335px #fff5d8,
    -177px 109px #fff5d8,
    1029px 689px #cfe0ff,
    661px 777px #fff,
    1396px 1062px #ffe9c4,
    197px -108px #e8f0ff,
    805px 116px #fff5d8,
    992px 555px #cfe0ff,
    1068px 470px #cfe0ff,
    227px 309px #ffe9c4,
    123px 795px #fff5d8,
    -77px -88px #ffe9c4,
    49px 406px #fff,
    -80px 517px #ffe9c4,
    505px -64px #cfe0ff,
    535px 725px #cfe0ff,
    246px 417px #ffe9c4,
    -61px 856px #fff,
    1231px 238px #cfe0ff,
    1128px 846px #fff5d8,
    1389px 69px #cfe0ff,
    995px 777px #fff5d8,
    90px 920px #cfe0ff,
    898px 945px #ffe9c4,
    703px 1093px #fff,
    1246px 330px #fff5d8,
    15px 1099px #ffe9c4,
    12px 977px #e8f0ff,
    1350px 726px #ffe9c4,
    662px 803px #cfe0ff,
    509px 413px #e8f0ff,
    1164px 801px #cfe0ff,
    105px 720px #ffe9c4,
    213px -95px #ffe9c4,
    -191px 970px #cfe0ff,
    -289px 602px #fff5d8,
    909px -246px #ffe9c4,
    -55px 797px #e8f0ff,
    846px 439px #fff,
    821px 1049px #cfe0ff,
    -69px 662px #fff5d8,
    1145px -200px #fff5d8,
    178px 633px #fff,
    887px -113px #e8f0ff,
    575px 963px #cfe0ff,
    154px 389px #fff5d8,
    273px 583px #cfe0ff,
    1128px 378px #ffe9c4,
    724px 822px #cfe0ff,
    1211px 661px #fff,
    557px 597px #e8f0ff,
    681px 197px #fff5d8,
    1115px 853px #cfe0ff,
    753px -205px #ffe9c4,
    -177px 444px #cfe0ff,
    1124px 923px #fff5d8,
    -180px 340px #cfe0ff,
    393px 918px #fff5d8,
    799px 868px #fff5d8,
    315px 419px #fff5d8,
    1396px 965px #fff5d8,
    596px 353px #cfe0ff,
    660px 89px #ffe9c4,
    927px 968px #fff,
    1346px -294px #fff5d8,
    580px 1014px #fff,
    166px -38px #fff,
    276px -149px #fff5d8,
    -211px 1067px #e8f0ff,
    710px -66px #fff,
    705px 739px #cfe0ff,
    875px 319px #fff,
    248px 495px #fff5d8,
    1016px 226px #fff5d8,
    58px 809px #fff,
    -130px 371px #cfe0ff,
    1247px 964px #fff5d8,
    130px 265px #fff5d8,
    728px 155px #ffe9c4,
    338px 631px #ffe9c4,
    501px -238px #ffe9c4,
    1075px 121px #e8f0ff,
    1099px 63px #fff5d8,
    -36px 19px #fff5d8,
    1142px 59px #e8f0ff,
    689px -206px #e8f0ff,
    1344px 1001px #fff5d8,
    1250px 1027px #cfe0ff,
    -253px 481px #fff5d8,
    537px -10px #e8f0ff,
    -93px 174px #fff5d8,
    384px 284px #ffe9c4,
    3px 495px #ffe9c4,
    1181px 382px #fff,
    373px 221px #cfe0ff,
    -200px 481px #cfe0ff,
    -281px 994px #fff5d8,
    1135px 962px #cfe0ff,
    573px 525px #ffe9c4,
    -265px 1018px #cfe0ff,
    457px 1045px #e8f0ff,
    422px 269px #e8f0ff,
    -30px -130px #cfe0ff,
    -99px 594px #fff5d8,
    221px 248px #ffe9c4,
    -135px 747px #cfe0ff,
    553px 971px #ffe9c4,
    116px 590px #e8f0ff,
    44px 1061px #ffe9c4,
    28px -56px #ffe9c4,
    387px 134px #fff5d8,
    738px 457px #fff5d8,
    437px 1057px #cfe0ff,
    1384px 203px #ffe9c4,
    54px 31px #cfe0ff,
    634px -144px #ffe9c4,
    991px -93px #ffe9c4,
    313px -10px #fff5d8,
    1397px 469px #fff,
    -66px -173px #ffe9c4,
    -145px 80px #fff,
    -149px -168px #ffe9c4,
    -146px 857px #e8f0ff,
    266px -281px #e8f0ff,
    1107px 504px #cfe0ff,
    1210px -76px #fff5d8,
    -264px 363px #e8f0ff,
    1297px 692px #e8f0ff,
    521px 712px #fff,
    434px -19px #fff5d8,
    -190px 84px #fff,
    187px 55px #fff5d8,
    177px 616px #fff5d8,
    317px 1096px #e8f0ff,
    462px -52px #e8f0ff,
    -278px 596px #ffe9c4,
    1151px -143px #ffe9c4,
    646px -178px #cfe0ff,
    -70px 760px #cfe0ff,
    -215px -72px #ffe9c4,
    402px 280px #ffe9c4,
    -213px -289px #ffe9c4,
    608px 641px #ffe9c4,
    165px 615px #e8f0ff,
    979px 295px #e8f0ff,
    130px 624px #cfe0ff,
    1396px 858px #fff5d8,
    795px 1050px #fff,
    -259px 528px #cfe0ff,
    1127px 893px #cfe0ff,
    616px 350px #cfe0ff,
    142px 234px #fff,
    331px 865px #cfe0ff,
    852px 983px #ffe9c4,
    436px 917px #fff,
    1231px 373px #fff5d8,
    1298px 718px #fff,
    73px 757px #ffe9c4,
    18px 71px #ffe9c4,
    54px 157px #e8f0ff,
    1194px 352px #ffe9c4,
    645px 153px #cfe0ff,
    435px 940px #e8f0ff,
    915px -283px #ffe9c4,
    558px -224px #fff5d8,
    1210px -229px #cfe0ff,
    963px 621px #ffe9c4,
    1065px 397px #ffe9c4,
    551px 432px #cfe0ff,
    709px -155px #fff,
    989px 468px #e8f0ff,
    841px 647px #fff5d8,
    1361px 678px #cfe0ff,
    1232px 144px #fff,
    -107px -233px #fff,
    653px 965px #ffe9c4,
    -248px 948px #fff,
    5px 1074px #ffe9c4,
    1302px -148px #fff5d8,
    399px 384px #fff,
    200px 560px #ffe9c4,
    1190px 591px #fff,
    32px -285px #fff,
    391px 23px #ffe9c4,
    149px -12px #e8f0ff,
    340px 780px #ffe9c4,
    50px -87px #fff,
    808px 594px #ffe9c4,
    -105px 817px #ffe9c4,
    0px 580px #fff,
    348px 629px #fff5d8,
    -73px 779px #fff,
    593px 1098px #ffe9c4,
    664px 543px #ffe9c4,
    11px 1082px #fff5d8,
    -104px 984px #e8f0ff,
    465px 134px #ffe9c4,
    678px 330px #e8f0ff,
    935px 601px #ffe9c4,
    648px 502px #e8f0ff,
    877px -25px #ffe9c4,
    221px 868px #fff5d8,
    530px 84px #cfe0ff,
    964px 1073px #e8f0ff,
    169px 601px #fff,
    517px 736px #ffe9c4,
    1229px 505px #e8f0ff,
    232px 895px #cfe0ff,
    541px 256px #e8f0ff,
    271px 234px #e8f0ff,
    1051px 373px #cfe0ff,
    1204px 788px #fff,
    613px 354px #ffe9c4,
    1004px 81px #e8f0ff,
    26px 899px #fff5d8,
    347px 654px #ffe9c4,
    980px 463px #ffe9c4,
    164px 866px #fff5d8,
    329px 450px #fff,
    722px 413px #e8f0ff,
    613px 1027px #cfe0ff,
    -176px 558px #ffe9c4,
    1143px 399px #ffe9c4,
    762px -29px #cfe0ff,
    1381px 343px #e8f0ff,
    -89px -202px #cfe0ff,
    807px 640px #e8f0ff,
    651px 460px #fff5d8,
    609px 741px #cfe0ff,
    1195px 489px #fff,
    -58px 618px #ffe9c4,
    -203px 407px #fff5d8,
    795px -82px #fff5d8,
    1203px -114px #cfe0ff,
    -274px 733px #fff5d8,
    1205px 494px #cfe0ff,
    787px 35px #ffe9c4,
    1154px 495px #ffe9c4,
    -264px 497px #ffe9c4,
    1329px 1008px #fff,
    -59px -180px #e8f0ff,
    -126px 911px #fff5d8,
    -48px 881px #cfe0ff,
    316px -127px #e8f0ff,
    256px 802px #fff,
    188px 519px #fff,
    1114px 803px #fff,
    -289px 285px #fff,
    134px -123px #ffe9c4,
    591px -30px #fff5d8,
    1215px 656px #fff5d8,
    661px 989px #e8f0ff,
    278px 290px #e8f0ff,
    932px 547px #cfe0ff,
    488px 756px #e8f0ff,
    996px -121px #fff,
    13px 544px #fff,
    566px 1088px #cfe0ff,
    -125px 502px #fff5d8,
    740px 516px #e8f0ff,
    1189px 344px #cfe0ff,
    1389px -45px #fff5d8,
    21px 89px #fff5d8,
    83px -297px #fff5d8,
    980px 808px #cfe0ff,
    139px 497px #fff,
    496px 1050px #ffe9c4,
    -199px 657px #fff,
    58px 658px #ffe9c4,
    440px 69px #ffe9c4,
    -260px 683px #fff5d8,
    -79px 915px #ffe9c4,
    47px -127px #e8f0ff,
    -299px 845px #cfe0ff,
    -183px 1053px #ffe9c4,
    1337px 207px #ffe9c4,
    384px 1097px #e8f0ff,
    748px -46px #fff5d8,
    1295px 746px #cfe0ff,
    1287px 485px #e8f0ff,
    958px 419px #fff5d8,
    924px 1026px #ffe9c4,
    22px 482px #fff,
    758px 426px #ffe9c4,
    1118px 827px #fff,
    551px 348px #fff5d8,
    694px 943px #ffe9c4,
    639px 100px #e8f0ff,
    988px -103px #ffe9c4,
    770px 685px #ffe9c4,
    186px 1065px #e8f0ff;
  animation: twinkleA 9s ease-in-out infinite;
}
@keyframes twinkleA {
  0%   { opacity: .55; }
  25%  { opacity: .85; }
  50%  { opacity: .62; }
  75%  { opacity: .95; }
  100% { opacity: .55; }
}
  50%  { opacity: .75; }
  100% { opacity: .45; }

/* 第 2 层：中距离星（中等大小） */
.stars-b {
  width: 2px; height: 2px;
  box-shadow:
    811px -132px #d8e6ff,
    224px -238px #d8e6ff,
    532px 485px #ffeed0,
    274px 51px #d8e6ff,
    -148px 271px #ffeed0,
    946px 206px #ffeed0,
    910px -234px #d8e6ff,
    303px 74px #ffeed0,
    -42px 725px #d8e6ff,
    1226px -267px #fff,
    494px 299px #fff,
    929px -245px #ffeed0,
    -203px 513px #ffeed0,
    -84px -247px #d8e6ff,
    980px 143px #d8e6ff,
    606px 633px #ffeed0,
    1073px 519px #d8e6ff,
    1371px 709px #d8e6ff,
    1017px 74px #ffeed0,
    480px -176px #fff,
    305px -219px #ffeed0,
    254px 478px #ffeed0,
    656px 697px #ffeed0,
    1096px 413px #fff,
    1127px 554px #fff,
    105px -165px #ffeed0,
    839px 171px #ffeed0,
    1374px -50px #d8e6ff,
    1398px 462px #ffeed0,
    1133px 193px #fff,
    1058px 410px #ffeed0,
    1130px 16px #d8e6ff,
    35px 1077px #fff,
    1171px 330px #fff,
    -43px 781px #fff,
    -170px 451px #ffeed0,
    1385px 126px #fff,
    655px 981px #ffeed0,
    882px 104px #ffeed0,
    403px -132px #fff,
    -10px -117px #ffeed0,
    1286px 234px #ffeed0,
    941px 642px #ffeed0,
    1005px 151px #fff,
    1107px 222px #ffeed0,
    64px 1080px #fff,
    286px 156px #fff,
    1080px -206px #fff,
    347px -116px #fff,
    228px -74px #fff,
    365px 1040px #fff,
    353px 311px #d8e6ff,
    482px 401px #d8e6ff,
    109px 540px #ffeed0,
    49px 446px #ffeed0,
    1298px 676px #fff,
    78px -299px #ffeed0,
    476px 934px #fff,
    245px 397px #d8e6ff,
    582px 269px #fff,
    1046px 1049px #ffeed0,
    -95px -82px #ffeed0,
    148px -291px #ffeed0,
    383px -54px #fff,
    121px -51px #fff,
    669px 619px #d8e6ff,
    377px 485px #ffeed0,
    593px 927px #ffeed0,
    944px 771px #fff,
    -266px 52px #d8e6ff,
    1064px 393px #fff,
    643px 73px #d8e6ff,
    -240px 762px #ffeed0,
    779px 773px #ffeed0,
    -240px 957px #d8e6ff,
    1110px 414px #ffeed0,
    1193px 806px #d8e6ff,
    1027px 29px #ffeed0,
    48px 267px #fff,
    1058px -140px #fff,
    596px -299px #ffeed0,
    322px 889px #fff,
    -291px -215px #fff,
    1282px -290px #d8e6ff,
    753px 478px #fff,
    30px 938px #d8e6ff,
    123px 318px #ffeed0,
    802px -36px #d8e6ff,
    946px 384px #ffeed0,
    1167px -142px #d8e6ff,
    547px 50px #d8e6ff,
    390px 692px #d8e6ff,
    739px -68px #ffeed0,
    838px 95px #ffeed0,
    -248px 1042px #fff,
    1170px -222px #d8e6ff,
    78px 64px #fff,
    1082px 722px #fff,
    1015px 658px #ffeed0,
    1200px -217px #fff,
    204px 677px #fff,
    505px 494px #fff,
    852px 684px #fff,
    534px 900px #fff,
    93px 739px #ffeed0,
    528px 862px #ffeed0,
    -121px 127px #ffeed0,
    1px 276px #fff,
    221px 82px #fff,
    165px 571px #fff,
    -2px -93px #d8e6ff,
    837px 842px #ffeed0,
    663px 71px #fff,
    1281px 729px #fff,
    668px 577px #ffeed0,
    720px 650px #d8e6ff,
    807px -168px #ffeed0,
    588px 687px #fff,
    1233px 732px #ffeed0,
    106px 305px #d8e6ff,
    922px 900px #ffeed0,
    900px 643px #d8e6ff,
    364px 282px #fff,
    917px 606px #d8e6ff,
    296px 913px #ffeed0,
    1090px -35px #d8e6ff,
    1368px 263px #fff,
    539px 503px #ffeed0,
    869px 417px #fff,
    916px 230px #fff,
    -281px 519px #d8e6ff,
    1184px 491px #ffeed0,
    731px -110px #ffeed0,
    342px 158px #fff,
    72px 271px #ffeed0,
    761px 773px #d8e6ff,
    -163px 1035px #d8e6ff,
    1038px 895px #ffeed0,
    -78px 953px #fff,
    876px 758px #d8e6ff,
    1028px 577px #d8e6ff,
    -42px 357px #d8e6ff,
    1176px -34px #fff,
    606px 576px #fff,
    1367px 260px #d8e6ff,
    -149px 48px #ffeed0,
    1099px 598px #ffeed0,
    854px 213px #fff,
    720px 656px #d8e6ff,
    901px 168px #ffeed0,
    384px 8px #d8e6ff,
    1267px 1050px #ffeed0,
    1119px 456px #fff,
    642px 1030px #ffeed0,
    -23px 601px #d8e6ff,
    -39px 479px #fff,
    -264px 192px #d8e6ff,
    53px -266px #d8e6ff,
    1351px 936px #fff,
    1304px 175px #d8e6ff,
    -168px 534px #fff,
    891px 768px #fff,
    -180px -80px #fff,
    -217px -212px #ffeed0,
    567px 154px #d8e6ff,
    745px 937px #fff,
    1260px 237px #ffeed0,
    891px 60px #ffeed0,
    690px 13px #ffeed0,
    1119px -256px #fff,
    -98px -294px #d8e6ff,
    1383px 868px #fff,
    555px -176px #fff,
    380px 208px #d8e6ff,
    1136px 470px #d8e6ff,
    -192px 707px #ffeed0,
    897px -81px #ffeed0,
    524px -256px #d8e6ff,
    -71px 655px #d8e6ff,
    20px 771px #d8e6ff,
    -166px 578px #d8e6ff,
    592px 654px #fff,
    393px 172px #fff,
    24px -275px #ffeed0,
    86px 55px #ffeed0,
    692px 347px #ffeed0,
    497px 547px #fff,
    570px -126px #d8e6ff,
    419px 985px #d8e6ff,
    43px 334px #fff,
    1288px 722px #fff,
    -43px 620px #d8e6ff,
    304px 513px #fff,
    -253px -53px #fff,
    704px 885px #ffeed0,
    -24px 231px #ffeed0,
    560px -92px #d8e6ff,
    416px 123px #fff,
    1123px 773px #ffeed0,
    458px 582px #d8e6ff,
    70px 81px #ffeed0,
    760px -209px #ffeed0,
    443px 87px #ffeed0,
    681px 146px #fff,
    -123px 558px #d8e6ff,
    867px 306px #ffeed0,
    415px -126px #d8e6ff,
    438px -89px #fff,
    1214px 1069px #ffeed0,
    381px 351px #fff,
    1012px 25px #d8e6ff,
    892px 256px #ffeed0,
    17px 219px #fff,
    1044px 210px #fff,
    -102px 240px #fff,
    741px -249px #ffeed0,
    -86px 1088px #ffeed0,
    620px 393px #d8e6ff,
    550px 134px #ffeed0,
    1057px -152px #d8e6ff;
  animation: twinkleB 7.5s ease-in-out infinite;
}
@keyframes twinkleB {
  0%   { opacity: .68; }
  25%  { opacity: 1; }
  50%  { opacity: .78; }
  75%  { opacity: .95; }
  100% { opacity: .68; }
}
  50%  { opacity: 1;  transform: scale(1.08); }
  100% { opacity: .6; transform: scale(1); }

/* 第 3 层：近处亮星（带光晕） */
.stars-c {
  width: 3px; height: 3px;
  box-shadow:
    516px 84px #fff,
    112px 52px #fff5d8,
    882px 903px #e8f0ff,
    659px 374px #fff,
    1390px -49px #fff5d8,
    308px -32px #e8f0ff,
    -130px 732px #e8f0ff,
    1260px 767px #fff,
    -242px 499px #e8f0ff,
    517px 321px #fff,
    654px 482px #fff,
    666px 362px #e8f0ff,
    1254px -269px #fff,
    187px 24px #fff5d8,
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    1199px 120px #e8f0ff,
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    819px 414px #fff,
    67px 226px #e8f0ff,
    581px 756px #e8f0ff,
    1051px 561px #fff5d8,
    -53px -248px #fff,
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    903px 49px #e8f0ff,
    321px 475px #fff5d8,
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    619px 89px #fff,
    -178px -30px #fff,
    -208px 494px #fff5d8,
    1258px 946px #e8f0ff,
    -41px 754px #e8f0ff;
  animation: twinkleC 6s ease-in-out infinite;
  filter: drop-shadow(0 0 4px rgba(255, 245, 216, .9));
}

/* 第 4 层：超细密背景星尘（最多、最暗） */
.stars-d {
  width: 1px; height: 1px;
  box-shadow:
    94px 1296px #cfe0ff,
    486px -139px #ffe9c4,
    604px 1135px #fff5d8,
    -283px 1196px #fff5d8,
    978px -294px #fff,
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    400px 140px #fff,
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    636px 231px #ffe9c4,
    -133px 105px #fff5d8;
  animation: twinkleD 11s ease-in-out infinite, driftD 150s linear infinite;
}
@keyframes twinkleD {
  0%   { opacity: .38; }
  25%  { opacity: .58; }
  50%  { opacity: .44; }
  75%  { opacity: .62; }
  100% { opacity: .38; }
}
  50%  { opacity: .52; }
  100% { opacity: .3; }
@keyframes driftD {
  0%   { transform: translate3d(0, 0, 0); }
  50%  { transform: translate3d(-45px, 30px, 0); }
  100% { transform: translate3d(0, 0, 0); }
}
  100% { transform: translate3d(-90px, 60px, 0); }

@keyframes twinkleC {
  0%   { opacity: .85; transform: scale(1); }
  25%  { opacity: 1;   transform: scale(1.16); }
  50%  { opacity: .9;  transform: scale(1.04); }
  75%  { opacity: 1;   transform: scale(1.12); }
  100% { opacity: .85; transform: scale(1); }
}
  50%  { opacity: 1;  transform: scale(1.25); }
  100% { opacity: .8; transform: scale(1.05); }

/* 整体漂移（视差：越近越快） */
@keyframes driftA {
  0%   { transform: translate3d(0, 0, 0); }
  50%  { transform: translate3d(-80px, 55px, 0); }
  100% { transform: translate3d(0, 0, 0); }
}
  100% { transform: translate3d(-160px, 110px, 0); }
@keyframes driftB {
  0%   { transform: translate3d(0, 0, 0); }
  50%  { transform: translate3d(-140px, 95px, 0); }
  100% { transform: translate3d(0, 0, 0); }
}
  100% { transform: translate3d(-280px, 190px, 0); }
@keyframes driftC {
  0%   { transform: translate3d(0, 0, 0); }
  50%  { transform: translate3d(-210px, 150px, 0); }
  100% { transform: translate3d(0, 0, 0); }
}
  100% { transform: translate3d(-420px, 300px, 0); }
/* 速度：A 层 90s、B 层 55s、C 层 34s（近的快，产生纵深） */
.stars-a {
  animation: twinkleA 9s ease-in-out infinite,
             driftA 90s linear infinite;
}
.stars-b {
  animation: twinkleB 7.5s ease-in-out infinite,
             driftB 55s linear infinite;
}
.stars-c {
  animation: twinkleC 6s ease-in-out infinite,
             driftC 34s linear infinite;
}

/* 鼠标 / 陀螺仪视差（JS 写 CSS 变量） */
.stars-layer {
  transform: translate3d(var(--px, 0px), var(--py, 0px), 0);
  transition: transform .45s cubic-bezier(.22, .61, .36, 1);
}

/* 流星改由 #meteorCanvas 绘制（见 starfield.js） */

/* ---------- 极光 ---------- */
.aurora {
  position: fixed;
  left: -12%; right: -12%;
  bottom: -16%;
  height: 50vh;
  z-index: 2;
  pointer-events: none;
  filter: blur(48px);
  opacity: .45;
  background:
    radial-gradient(ellipse 55% 60% at 24% 100%, rgba(56, 189, 248, .28), transparent 68%),
    radial-gradient(ellipse 48% 55% at 54% 108%, rgba(168, 85, 247, .22), transparent 70%),
    radial-gradient(ellipse 58% 52% at 82% 96%, rgba(232, 163, 61, .20), transparent 72%);
  animation: auroraFlow 20s ease-in-out infinite;
}
@keyframes auroraFlow {
  0%   { transform: translate3d(-2%, 2%, 0) scaleY(1) skewX(0deg); opacity: .34; }
  50%  { transform: translate3d(1%, -1%, 0) scaleY(1.14) skewX(2.5deg); opacity: .54; }
  100% { transform: translate3d(3%, 1.5%, 0) scaleY(1.05) skewX(-2deg); opacity: .42; }
}

/* ---------- 顶部星云 ---------- */
.star-nebula {
  position: fixed;
  inset: -20%;
  z-index: 2;
  pointer-events: none;
  background:
    radial-gradient(ellipse 46% 30% at 26% 12%, rgba(88, 118, 214, .17), transparent 64%),
    radial-gradient(ellipse 40% 26% at 76% 20%, rgba(146, 92, 210, .13), transparent 66%),
    radial-gradient(ellipse 70% 40% at 50% -6%, rgba(26, 40, 90, .55), transparent 72%);
  animation: nebulaDrift 48s ease-in-out infinite;
}
@keyframes nebulaDrift {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-1.4%, 1%, 1.05); }
}

/* ---------- 颗粒质感 ---------- */
.grain {
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

/* 旧 bg-layer 退役 */
.bg-layer { display: none !important; }
#starCanvas { display: none !important; }

/* ---------- 鼠标光晕 ---------- */

/* ---------- 实时刷新条 ---------- */
.live-bar {
  position: fixed;
  left: 50%; bottom: 18px;
  transform: translateX(-50%) translateY(80px);
  z-index: 60;
  display: flex; align-items: center; gap: 8px;
  padding: 8px 15px;
  border-radius: 99px;
  background: rgba(14, 18, 26, .9);
  border: 1px solid rgba(232, 163, 61, .24);
  backdrop-filter: blur(14px) saturate(1.4);
  box-shadow: 0 10px 36px -14px rgba(0, 0, 0, .9);
  font-size: 12px;
  color: var(--muted);
  opacity: 0;
  transition: opacity .32s ease, transform .32s cubic-bezier(.34, 1.3, .64, 1);
  pointer-events: none;
}
.live-bar.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.live-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 9px rgba(74, 222, 128, .85);
  animation: livePulse 2s ease-in-out infinite;
}
@keyframes livePulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%     { opacity: .4; transform: scale(.78); }
}
.live-bar.updated .live-dot { background: var(--accent); box-shadow: 0 0 9px rgba(232, 163, 61, 1); }

/* ---------- 手机端优化 ---------- */
@media (max-width: 768px) {
  /* 手机保留所有层，只降低 C 层密度感 */
  .stars-c { opacity: .75; }
  .aurora { height: 36vh; filter: blur(38px); opacity: .38; }
}

@media (prefers-reduced-motion: reduce) {
  .stars-a, .stars-b, .stars-c, .aurora, .star-nebula, .meteor { animation: none !important; }
  }

/* ===== 内容层级：确保内容在星空之上 ===== */
.topbar, header.topbar { position: relative; z-index: 50; }
.wrap, main, #blocks, .page-fade { position: relative; z-index: 20; }
footer { position: relative; z-index: 20; }
.drawer, .drawer-mask { z-index: 300; }
.gmodal, .rm-modal { z-index: 900; }

/* ============================================================
   鼠标拖尾星轨（动态模糊拖影）
   ============================================================ */

/* 鼠标核心光点（锐利） */

@media (hover: none), (max-width: 768px) {
  }
@media (prefers-reduced-motion: reduce) {
  }

/* ===== 布局保护：装饰层绝不撑高文档 ===== */
.deep-space,
.stars-layer,
.star-nebula,
.aurora,
.grain,
#meteorCanvas,
.bg-layer {
  position: fixed !important;
  pointer-events: none;
}

/* 根元素不让溢出内容撑高 */
html {
  overflow-x: hidden;
}
body {
  overflow-x: hidden;
  /* 关键：隐藏纵向溢出，防止 fixed 层被算进文档高度 */
  position: relative;
}

/* ============================================================
   外部页面动画补全（player.html / muyu.html / ai.html）
   这些页面没有 app.js 的 reveal 系统，用 CSS 自己做入场
   ============================================================ */

/* ---------- 入场关键帧 ---------- */

/* ---------- 卡片入场 ---------- */

/* 逐条延迟 */
.card:nth-child(1) { animation-delay: .02s; }
.card:nth-child(2) { animation-delay: .08s; }
.card:nth-child(3) { animation-delay: .14s; }
.card:nth-child(4) { animation-delay: .20s; }
.card:nth-child(5) { animation-delay: .26s; }
.card:nth-child(6) { animation-delay: .32s; }
.card:nth-child(n+7) { animation-delay: .38s; }

.kv:nth-child(1), .box:nth-child(1) { animation-delay: .04s; }
.kv:nth-child(2), .box:nth-child(2) { animation-delay: .10s; }
.kv:nth-child(3), .box:nth-child(3) { animation-delay: .16s; }
.kv:nth-child(4), .box:nth-child(4) { animation-delay: .22s; }
.kv:nth-child(5), .box:nth-child(5) { animation-delay: .28s; }
.kv:nth-child(6), .box:nth-child(6) { animation-delay: .34s; }
.kv:nth-child(n+7), .box:nth-child(n+7) { animation-delay: .40s; }

/* 玩法按钮：一片片弹入 */
.pbtn { animation: 1.45, .64, 1) both; }
.pbtn:nth-child(1) { animation-delay: .05s; }
.pbtn:nth-child(2) { animation-delay: .08s; }
.pbtn:nth-child(3) { animation-delay: .11s; }
.pbtn:nth-child(4) { animation-delay: .14s; }
.pbtn:nth-child(5) { animation-delay: .17s; }
.pbtn:nth-child(6) { animation-delay: .20s; }
.pbtn:nth-child(7) { animation-delay: .23s; }
.pbtn:nth-child(8) { animation-delay: .26s; }
.pbtn:nth-child(9) { animation-delay: .29s; }
.pbtn:nth-child(10) { animation-delay: .32s; }
.pbtn:nth-child(11) { animation-delay: .35s; }
.pbtn:nth-child(12) { animation-delay: .38s; }
.pbtn:nth-child(n+13) { animation-delay: .41s; }

/* 分类标签横滑入 */
.pcat { animation: 1.2, .36, 1) both; }
.pcat:nth-child(1) { animation-delay: .02s; }
.pcat:nth-child(2) { animation-delay: .06s; }
.pcat:nth-child(3) { animation-delay: .10s; }
.pcat:nth-child(4) { animation-delay: .14s; }
.pcat:nth-child(5) { animation-delay: .18s; }
.pcat:nth-child(n+6) { animation-delay: .22s; }

/* ---------- 标题 ---------- */
h1, h2, h3, .head, .sec h3, .login-box h1 {
}

/* ---------- 按钮 / 输入框 ---------- */
button, input, textarea, select, a.back, .loginpill {
  transition:
    transform .28s cubic-bezier(.34, 1.4, .64, 1),
    background .24s ease,
    color .24s ease,
    border-color .24s ease,
    box-shadow .28s ease,
    filter .24s ease;
}
button:not([disabled]):hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
}
button:not([disabled]):active {
  transform: translateY(0) scale(.96);
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 60%, transparent) !important;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent),
              0 0 20px -6px color-mix(in srgb, var(--accent) 50%, transparent) !important;
}

/* ---------- 卡片悬停 ---------- */
.card, .kv, .box {
  transition:
    transform .3s cubic-bezier(.34, 1.4, .64, 1),
    box-shadow .3s ease,
    border-color .26s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 22%, transparent);
  box-shadow: 0 14px 40px -20px rgba(0, 0, 0, .9);
}
.kv:hover, .box:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 26%, transparent);
}

/* 玩法按钮悬停 */
.pbtn {
  transition:
    transform .28s cubic-bezier(.34, 1.4, .64, 1),
    background .26s ease,
    border-color .26s ease,
    box-shadow .28s ease;
}
.pbtn:hover {
  transform: translateY(-2px) scale(1.02);
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  box-shadow: 0 8px 22px -10px color-mix(in srgb, var(--accent) 65%, transparent);
}

/* ---------- 木鱼页专用 ---------- */
.muyu {
  transition: transform .12s cubic-bezier(.34, 1.5, .64, 1), filter .3s ease;
}
.muyu:hover {
  filter: drop-shadow(0 22px 40px rgba(232, 163, 61, .42));
}
.global .num {
  transition: transform .14s cubic-bezier(.34, 1.6, .64, 1);
}
.rank li {
  transition: background .26s ease, padding-left .28s ease;
}
.rank li:hover {
  background: color-mix(in srgb, var(--accent) 7%, transparent);
  padding-left: 8px;
}

/* ---------- 可访问性 ---------- */
@media (prefers-reduced-motion: reduce) {
  .card, .kv, .box, .pbtn, .pcat, h1, h2, h3, .head,
  .rank li, .sec h3, .login-box h1, .sub, .hint {
    animation: none !important;
    transition: none !important;
  }
}